0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)
   Fabric 0.15.7

1. Describe the bug
   Game crashes at random when using the backpack.

2. Write steps to reproduce the bug
   open backpack, add or take out items, open, close bag, repeat until crashing.

Please let me know if i misunderstand the log, but i just saw it refers to travelers backpack mod and happens only when i do stuff with the backpack.

Error screen says :
Game crashed
The game crashed whilst rendering screen
Error: java.lang.IndexOutOfBoundsException: Index: 22, size: 19

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 2024-06-22 18:02:00
Description: Rendering screen

java.lang.IndexOutOfBoundsException: Index: 22, Size: 19
at java.base/java.util.ArrayList.rangeCheckForAdd(ArrayList.java:756)
at java.base/java.util.ArrayList.add(ArrayList.java:481)
at nourl.mythicmetals.abilities.Ability.lambda$addTooltip$0(Ability.java:97)
at net.fabricmc.fabric.api.client.item.v1.ItemTooltipCallback.lambda$static$0(ItemTooltipCallback.java:34)
at net.minecraft.class_1799.handler$ccj001$fabric-item-api-v1$getTooltip(class_1799.java:5611)
at net.minecraft.class_1799.method_7950(class_1799.java:791)
at net.minecraft.class_437.method_25408(class_437.java:225)
at net.minecraft.class_465.method_51454(class_465.java:183)
at net.minecraft.class_465.method_2380(class_465.java:178)
at com.tiviacz.travelersbackpack.client.screen.TravelersBackpackHandledScreen.method_2380(TravelersBackpackHandledScreen.java:334)
at com.tiviacz.travelersbackpack.client.screen.TravelersBackpackHandledScreen.method_25394(TravelersBackpackHandledScreen.java:328)
at net.minecraft.class_437.method_47413(class_437.java:110)
at net.minecraft.class_757.method_3192(class_757.java:945)
at net.minecraft.class_310.method_1523(class_310.java:1219)
at net.minecraft.class_310.method_1514(class_310.java:802)
at net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
crash-2024-06-22_18.02.00-client.txt

It's probably mythic metals mod issue

Thanks!

Closing, if needed reopen