[20:19:28 WARN]: java.lang.NullPointerException
[20:19:28 WARN]:        at me.luckyzz.arbuzikclans.clan.menu.UpgradeClanMenu.openMenu(UpgradeClanMenu.java:71)
[20:19:28 WARN]:        at me.luckyzz.arbuzikclans.clan.menu.MainClanMenu$1.processClick(MainClanMenu.java:91)
[20:19:28 WARN]:        at me.luckyzz.arbuzikclans.luckapi.menu.button.ClickCallback.process(ClickCallback.java:10)
[20:19:28 WARN]:        at me.luckyzz.arbuzikclans.luckapi.menu.button.MenuButton.process(MenuButton.java:34)
[20:19:28 WARN]:        at me.luckyzz.arbuzikclans.luckapi.menu.PreparedMenu.processClick(PreparedMenu.java:108)
[20:19:28 WARN]:        at me.luckyzz.arbuzikclans.luckapi.menu.LuckMenuService.handleClick(LuckMenuService.java:28)
[20:19:28 WARN]:        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor253.execute(Unknown Source)
[20:19:28 WARN]:        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69)
[20:19:28 WARN]:        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76)
[20:19:28 WARN]:        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70)
[20:19:28 WARN]:        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:624)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:2797)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.PacketPlayInWindowClick.a(SourceFile:32)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.PacketPlayInWindowClick.a(SourceFile:10)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:55)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1325)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1318)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1294)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1138)
[20:19:28 WARN]:        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:292)
[20:19:28 WARN]:        at java.lang.Thread.run(Unknown Source)