Hi
your plugin is nice, but my server say :

[20:58:13] [Server thread/ERROR]: Could not pass event InventoryClickEvent to HomeGUI v1.0.2
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:319) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:2422) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.PacketPlayInWindowClick.a(SourceFile:32) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.PacketPlayInWindowClick.a(SourceFile:10) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:28) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(SourceFile:144) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(SourceFile:118) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1051) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1044) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(SourceFile:127) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1028) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:960) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.IllegalArgumentException: Unsupported Material: DIAMOND_PICKAXE
at com.cryptomorin.xseries.XMaterial.lambda$matchXMaterial$0(XMaterial.java:1390) ~[?:?]
at java.util.Optional.orElseThrow(Optional.java:408) ~[?:?]
at com.cryptomorin.xseries.XMaterial.matchXMaterial(XMaterial.java:1390) ~[?:?]
at me.iangry.homegui.events.HomeEvents.onGuiActivation(HomeEvents.java:91) ~[?:?]
at jdk.internal.reflect.GeneratedMethodAccessor275.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:315) ~[spigot.jar:3028-Spigot-79d53c2-7eb3564]
... 18 more

La verdad que es un plugin muy bueno, pero le falta mucho para solucionar y arreglar como puede ser, que cuando establezcas un home, se cierre el inventario, y lo mismo con eliminar un home. Otra cosa para solucionar, si entras al menu de agregar un home, con click derecho tambien lo eliminas, no tiene mucho sentido eso