⚠️[Error] Can't open "Active advancements" GUI

[User4716]

When I am in this GUI and I press the enchanted book


It doesn't open any GUI but instead it just throws an error in the console:

[16:55:04 ERROR]: Could not pass event InventoryClickEvent to CustomAdvancements v1.2.9
java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 27
	at java.util.Arrays$ArrayList.set(Arrays.java:4170) ~[?:?]
	at net.minecraft.core.NonNullList.set(NonNullList.java:50) ~[paper-1.20.1.jar:git-Paper-32]
	at org.bukkit.craftbukkit.v1_20_R1.inventory.CraftInventoryCustom$MinecraftInventory.a(CraftInventoryCustom.java:167) ~[paper-1.20.1.jar:git-Paper-32]
	at org.bukkit.craftbukkit.v1_20_R1.inventory.CraftInventory.setItem(CraftInventory.java:99) ~[paper-1.20.1.jar:git-Paper-32]
	at me.tippie.customadvancements.guis.ActiveAdvancementsGUI.getInventory(ActiveAdvancementsGUI.java:45) ~[CustomAdvancements-1.2.9.jar:?]
	at me.tippie.customadvancements.guis.InventoryGUI.getInventory(InventoryGUI.java:38) ~[CustomAdvancements-1.2.9.jar:?]
	at me.tippie.customadvancements.guis.MainGUI.onClick(MainGUI.java:50) ~[CustomAdvancements-1.2.9.jar:?]
	at me.tippie.customadvancements.guis.InventoryGUI.onInventoryClick(InventoryGUI.java:106) ~[CustomAdvancements-1.2.9.jar:?]
	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor39.execute(Unknown Source) ~[?:?]
	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:git-Paper-32]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
	at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.1.jar:git-Paper-32]
	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.1.jar:git-Paper-32]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
	at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClick(ServerGamePacketListenerImpl.java:3197) ~[?:?]
	at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:58) ~[?:?]
	at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:23) ~[?:?]
	at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:51) ~[?:?]
	at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?]
	at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
	at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1339) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:197) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?]
	at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1316) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1309) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.util.thread.BlockableEventLoop.runAllTasks(BlockableEventLoop.java:114) ~[?:?]
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1425) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1171) ~[paper-1.20.1.jar:git-Paper-32]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[paper-1.20.1.jar:git-Paper-32]
	at java.lang.Thread.run(Thread.java:833) ~[?:?]
[16:55:05 ERROR]: Could not pass event InventoryClickEvent to CustomAdvancements v1.2.9
java.lang.ArrayIndexOutOfBoundsException: null
[16:55:06 ERROR]: Could not pass event InventoryClickEvent to CustomAdvancements v1.2.9
java.lang.ArrayIndexOutOfBoundsException: null

That's basically it, and I have no idea why this error even happens, Maybe you forgot to update something to 1.20 and now it doesn't work anymore?

[User4716]

This does not always happen, just randomly and I don't really care about this, but I guess you could fix this after you are done fixing more important things