Both are broken and need to be updated.
OpenInv:
Itemizer:
Code
[05:25:59] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'ii' in plugin ItemizerX v1.3.2
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[patched_1.16.4.jar:git-Paper-330]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.16.4.jar:git-Paper-330]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchCommand(CraftServer.java:807) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.PlayerConnection.handleCommand(PlayerConnection.java:2011) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.PlayerConnection.c(PlayerConnection.java:1822) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:1775) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.PacketPlayInChat.a(PacketPlayInChat.java:5) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:23) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1133) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1126) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1087) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1001) ~[patched_1.16.4.jar:git-Paper-330]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:178) ~[patched_1.16.4.jar:git-Paper-330]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_275]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_16_R2/NBTBase
at me.focusvity.itemizerx.ItemizerXCommand.onCommand(ItemizerXCommand.java:491) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.16.4.jar:git-Paper-330]
... 19 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_16_R2.NBTBase
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:116) ~[patched_1.16.4.jar:git-Paper-330]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:111) ~[patched_1.16.4.jar:git-Paper-330]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_275]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_275]
at me.focusvity.itemizerx.ItemizerXCommand.onCommand(ItemizerXCommand.java:491) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[patched_1.16.4.jar:git-Paper-330]
... 19 more```