[10:02:09] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to HomeSpawnPlus v2.0.1-SNAPSHOT-b637
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at org.bukkit.craftbukkit.v1_9_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:231) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.PlayerInteractManager.a(PlayerInteractManager.java:482) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:888) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.PacketPlayInUseItem.a(SourceFile:55) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.PacketPlayInUseItem.a(SourceFile:11) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_74]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_74]
at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:721) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
Caused by: java.lang.NullPointerException
at com.andune.minecraft.hsp.util.BedUtilsImpl.findBedRecursive(BedUtilsImpl.java:118) ~[?:?]
at com.andune.minecraft.hsp.util.BedUtilsImpl.findBed(BedUtilsImpl.java:87) ~[?:?]
at com.andune.minecraft.hsp.util.BedUtilsImpl.setBukkitBedHome(BedUtilsImpl.java:169) ~[?:?]
at sun.reflect.GeneratedMethodAccessor470.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
at com.andune.minecraft.hsp.shade.guice.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:37) ~[?:?]
at com.sun.proxy.$Proxy80.setBukkitBedHome(Unknown Source) ~[?:?]
at com.andune.minecraft.hsp.util.HomeUtil.setHome(HomeUtil.java:314) ~[?:?]
at com.andune.minecraft.hsp.util.BedUtilsImpl.doBedClick(BedUtilsImpl.java:229) ~[?:?]
at com.andune.minecraft.hsp.EventListener.bedRightClick(EventListener.java:373) ~[?:?]
at com.andune.minecraft.hsp.server.bukkit.BukkitEventDispatcher.onPlayerInteract(BukkitEventDispatcher.java:181) ~[?:?]
at sun.reflect.GeneratedMethodAccessor141.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-creative.jar:git-Spigot-944aa20-8d16fc0]
... 17 more

I'm not 100% certain what this is, but I'm thinking it's when players are placing beds and clicking on them to set bed-homes. I havn't gotten complaints from users, however.

EDIT: in the mean time, i've turned off bed set home, and will watch the console to see if the NPE continues.