Issue: The client instantly crashes instantly when opening the player's inventory. I originally had this issue in a huge modpack, but when I created a new test instance and installed only the neccesary mods, the issue persisted.

According to the crash report, the problem is this line right here
https://github.com/TheWinABagel/Zenith/blob/9e9444d2c525409cfc87ca01540fbbe791ffafc9/src/main/java/dev/shadowsoffire/apotheosis/adventure/loot/RarityRegistry.java#L74C8-L74C8
I'm not a programmer, but the code seems to subtract 1 from a value that is already 0, so it results in a number lower than 0 which java appearantly doesn't like, because it throws an out of bounds error...

Weirdly though, the issue doesn't exist on fabric for some reason.

EDIT: The comment below the line seems to be describing this issue, so I don't know if I should leave the issue open, seeing that you already know about it. Feel free to close it if you do.

Mod loader: Quilt (0.22.4 beta, also tested with 0.22.0 release)

Mods installed: Fakerlib 0.0.9, Patchouli 83, Quilted Fabric API 7.4.0, Zenith Attributes 0.1.1, Zenith 0.2.4

Crash report:
crash-2023-12-16_14.01.32-client.txt

I get the same issue. Using QFAPI 7.4.0+0.90.0-1.20.1 and Quilt Loader 0.22.1-beta4.

I doubt it's a Quilt only issue but I know QFAPI 7.4.0+0.90.0 is far from being the latest version of the FAPI so maybe that's why. It's worth testing with older QFAPI versions maybe, namely 0.90.0.

Just tested with an in dev version, it seems to be working? Let me know if the next version fixes it (hopefully will be released in the next few days)

Seems to be fixed