When I try to place an image map, it says "Map couldn't be placed, there is another entity in the way". I don't know why, it's clear. I've tried it in different sizes and options.

Is there anything in your server log, giving further information?

Couldn't pass event PlayerInteractEvent to ImageMaps V1.0.6

Can you give me the full stacktrace?

One second please

[13:37:04] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:97) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:982) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more
[13:37:21] [Server thread/DEBUG] [net.minecraftforge.fml.FMLWorldPersistenceHook/WP]: Gathering id map for writing to world save world
[13:37:21] [Server thread/DEBUG] [net.minecraftforge.fml.FMLWorldPersistenceHook/WP]: ID Map collection complete world
[13:37:26] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /gamemode creative
[13:37:26] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer/]: [Peipr: Set own game mode to Creative Mode]
[13:37:32] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap place BFSF_logo true false 5x5
[13:37:33] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(ThreadTaskExecutor.java:119) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:937) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more
[13:38:11] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /weather clear
[13:38:11] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer/]: [Peipr: Set the weather to clear]
[13:38:18] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap place BFSF_logo true false 1x1
[13:38:20] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(ThreadTaskExecutor.java:119) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:937) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more
[13:38:26] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap place BFSF_logo true false 1x1
[13:38:27] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:97) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:982) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more
[13:38:33] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap place BFSF_logo true false 1x1
[13:38:43] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:97) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:982) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more
[13:38:46] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap place BFSF_logo true false 1x1
[13:38:48] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:97) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:982) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more
[13:38:53] [Server thread/TRACE] [net.minecraftforge.fml.loading.ModJarURLHandler/CORE]: Loading modjar URL modjar://forge/org/bukkit/inventory/HorseInventory.class got resource org/bukkit/inventory/HorseInventory.class true
[13:39:15] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap ?
[13:39:19] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap list
[13:39:37] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Peipr issued server command: /imagemap place BFSF_logo false false 1x1
[13:39:39] [Server thread/ERROR] [Minecraft/]: Could not pass event PlayerInteractEvent to ImageMaps v1.0.6
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304) ~[forge:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[forge:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:588) ~[forge:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:573) ~[forge:?]
at org.bukkit.craftbukkit.v1_16_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:454) ~[forge:?]
at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:401) ~[?:?]
at net.minecraft.network.play.ServerPlayNetHandler.func_184337_a(ServerPlayNetHandler.java:1413) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:38) ~[?:?]
at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.func_148833_a(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?]
at net.minecraft.network.PacketThreadUtil.lambda$ensureRunningOnSameThread$0(PacketThreadUtil.java:26) ~[?:?]
at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:136) ~[?:?]
at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:881) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:177) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:109) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:864) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:858) ~[?:?]
at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:97) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:982) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:760) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:270) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:1298) ~[forge:f563167d-9c7acb6c-9fb885e8]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.createMap(CraftServer.java:147) ~[forge:f563167d-9c7acb6c-9fb885e8]
at net.craftcitizen.imagemaps.ImageMaps.getMapItem(ImageMaps.java:402) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.placeImage(ImageMaps.java:360) ~[?:?]
at net.craftcitizen.imagemaps.ImageMaps.onInteract(ImageMaps.java:290) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor42.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[forge:?]
... 23 more

This seems like a bug in your server software. According to the error it fails to create a map when the plugin requests it to, something that should never happen.

Do you have any idea how that could be fixed?

I would recommend asking the provider of your server software. Some of their changes compared Spigot must've broken the Bukkit#createMap function in their implementation.

Alright, thank you very much

An interesting development, the error is now happening on stock Spigot 1.17 (but not 1.16.5) due to a change in Mojang code...

https://hub.spigotmc.org/jira/browse/SPIGOT-6510