Hi
Griefergames.net Server uses this addon to add more Blocks and many more features.
The Problem that i have is:
When i use my regular mods also with MysteryMod-1.20.1-1.0.1.jar and your old Version 1.0.0 the Worlddownloader runs, but it has no GUI etc. but i can download Maps.
If i use the new 1.1.1 Version the client crashes with the MystMod addon.
I try to find out what's exactly happen but im not a java developer ^^

Here is my crash report and the log:
crash-2024-01-13_08.55.28-client.txt
2024-01-13-3.log

Maybe you will find out something

Best regards
Fizzy Bubbele

This is caused by MysteryMod shading the entire Kotlin standard library instead of using the standard fabric-language-kotlin library.

Why they would do this is truly a mystery to me

Those "buy-cosmetics" mods like Badlion, Labymod etc are mostly complete trash in terms of software quality. I do not recommend using them at all as they only target your money. I cant fix that because its an issue of MysteryMod not following good practices.