Versions
WorldGuard version 7.0.4-SNAPSHOT+2062-58eaf31
WorldEdit version 7.2.0-SNAPSHOT+5202-b0d5100
git-Paper-131 (MC: 1.16.1)

[15:06:48 ERROR]: An unexpected error while handling a WorldEdit command java.lang.NoSuchMethodError: 'int com.sk89q.worldedit.world.World.getMinY()' at com.sk89q.worldedit.regions.AbstractRegion.getWorldMinY(AbstractRegion.java:210) ~[?:?] at com.sk89q.worldedit.regions.CuboidRegion.recalculate(CuboidRegion.java:109) ~[?:?] at com.sk89q.worldedit.regions.CuboidRegion.expand(CuboidRegion.java:224) ~[?:?] at com.sk89q.worldedit.command.SelectionCommands.outset(SelectionCommands.java:408) ~[?:?] at com.sk89q.worldedit.command.SelectionCommandsRegistration.cmd$_outset(SelectionCommandsRegistration.java:461) ~[?:?] at org.enginehub.piston.CommandManager.execute(CommandManager.java:157) ~[?:?] at com.sk89q.worldedit.extension.platform.PlatformCommandManager.handleCommand(PlatformCommandManager.java:494) ~[?:?] at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?] at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?] at com.sk89q.worldedit.util.eventbus.MethodEventHandler.dispatch(MethodEventHandler.java:58) ~[?:?] at com.sk89q.worldedit.util.eventbus.EventHandler.handleEvent(EventHandler.java:73) ~[?:?] at com.sk89q.worldedit.util.eventbus.EventBus.dispatch(EventBus.java:193) ~[?:?] at com.sk89q.worldedit.util.eventbus.EventBus.post(EventBus.java:181) ~[?:?] at com.sk89q.worldedit.bukkit.WorldEditPlugin.onCommand(WorldEditPlugin.java:365) ~[?:?] at com.sk89q.bukkit.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:55) ~[?:?] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.16.1.jar:git-Paper-131] at org.bukkit.craftbukkit.v1_16_R1.CraftServer.dispatchCommand(CraftServer.java:794) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.PlayerConnection.handleCommand(PlayerConnection.java:1912) ~[?:git-Paper-131] at net.minecraft.server.v1_16_R1.PlayerConnection.a(PlayerConnection.java:1723) ~[?:git-Paper-131] at net.minecraft.server.v1_16_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:23) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.TickTask.run(SourceFile:18) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.MinecraftServer.aZ(MinecraftServer.java:1137) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.MinecraftServer.executeNext(MinecraftServer.java:1130) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.MinecraftServer.a(MinecraftServer.java:1204) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.MinecraftServer.v(MinecraftServer.java:1001) ~[patched_1.16.1.jar:git-Paper-131] at net.minecraft.server.v1_16_R1.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.1.jar:git-Paper-131] at java.lang.Thread.run(Thread.java:834) [?:?]

please provide the full log. also support requests are better suited to discord.