As for the lightning and ice page, it gives this error and gui doesn't open again.

[kaan-gunay]

Lightning and ice page give this error when bind abilities on gui:

[16:33:15 WARN]: java.lang.NullPointerException: Cannot invoke "com.projectkorra.projectkorra.ability.CoreAbility.getElement()" because "ability" is null
[16:33:15 WARN]:        at BendingGUI-1.5.1-PK1.10.0.jar//com.strangeone101.bendinggui.menus.MenuBendingOptions.getItemForMove(MenuBendingOptions.java:100)
[16:33:15 WARN]:        at BendingGUI-1.5.1-PK1.10.0.jar//com.strangeone101.bendinggui.menus.MenuBendingOptions.update(MenuBendingOptions.java:910)
[16:33:15 WARN]:        at BendingGUI-1.5.1-PK1.10.0.jar//com.strangeone101.bendinggui.menus.MenuBendingOptions.openMenu(MenuBendingOptions.java:1008)
[16:33:15 WARN]:        at BendingGUI-1.5.1-PK1.10.0.jar//com.strangeone101.bendinggui.Listener.onItemRightClick(Listener.java:73)
[16:33:15 WARN]:        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor740.execute(Unknown Source)
[16:33:15 WARN]:        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:75)
[16:33:15 WARN]:        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80)
[16:33:15 WARN]:        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70)
[16:33:15 WARN]:        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:669)
[16:33:15 WARN]:        at org.bukkit.craftbukkit.v1_18_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:544)
[16:33:15 WARN]:        at net.minecraft.server.level.PlayerInteractManager.a(PlayerInteractManager.java:563)
[16:33:15 WARN]:        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1852)
[16:33:15 WARN]:        at net.minecraft.network.protocol.game.PacketPlayInUseItem.a(PacketPlayInUseItem.java:33)
[16:33:15 WARN]:        at net.minecraft.network.protocol.game.PacketPlayInUseItem.a(PacketPlayInUseItem.java:9)
[16:33:15 WARN]:        at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$ensureRunningOnSameThread$1(PlayerConnectionUtils.java:51)
[16:33:15 WARN]:        at net.minecraft.server.TickTask.run(TickTask.java:18)
[16:33:15 WARN]:        at net.minecraft.util.thread.IAsyncTaskHandler.d(IAsyncTaskHandler.java:153)
[16:33:15 WARN]:        at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.d(IAsyncTaskHandlerReentrant.java:24)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1400)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:188)
[16:33:15 WARN]:        at net.minecraft.util.thread.IAsyncTaskHandler.y(IAsyncTaskHandler.java:126)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.be(MinecraftServer.java:1377)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1370)
[16:33:15 WARN]:        at net.minecraft.util.thread.IAsyncTaskHandler.c(IAsyncTaskHandler.java:136)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1348)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1230)
[16:33:15 WARN]:        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316)
[16:33:15 WARN]:        at java.base/java.lang.Thread.run(Thread.java:833)

and you can't open the gui anymore. We didn't change the config.

Spigot: 1.18.2
Pk: 1.11.0
BendingGui: 1.5.1