It seems good, but it doesn’t work on version 1.21.1:


[18:18:19 INFO]: nikeal12 joined the game
[18:18:19 INFO]: nikeal12[/127.0.0.1:53420] logged in with entity id 149 at ([world]0.0, 70.0, 0.0)
[18:18:19 INFO]: nikeal12 lost connection: Internal Exception: java.lang.NoClassDefFoundError: net/minecraft/network/protocol/common/ServerboundCustomClickActionPacket
[18:18:20 INFO]: nikeal12 left the game
[18:18:20 WARN]: [BetterUI] Task #4478 for BetterUI v1.0 generated an exception
java.lang.NoClassDefFoundError: Could not initialize class alepando.dev.dialogapi.factory.actions.DialogAction
at BetterUI-1.0.jar/alepando.dev.dialogapi.factory.data.DialogDataBuilder.<init>(DialogDataBuilder.kt:19) ~[BetterUI-1.0.jar:?]
at BetterUI-1.0.jar/me.rayman202.betterUI.DialogManager.openMainMenu(DialogManager.kt:33) ~[BetterUI-1.0.jar:?]
at BetterUI-1.0.jar/me.rayman202.betterUI.JoinListener.onJoin$lambda$0(JoinListener.kt:42) ~[BetterUI-1.0.jar:?]
at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:86) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:475) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1724) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:473) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1596) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1302) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:329) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at java.base/java.lang.Thread.run(Thread.java:1575) ~[?:?]
Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: net/minecraft/server/dialog/DialogAction [in thread "Server thread"]
at BetterUI-1.0.jar/alepando.dev.dialogapi.factory.actions.DialogAction.<clinit>(DialogAction.kt:10) ~[BetterUI-1.0.jar:?]
... 11 more