Logs: https://mclo.gs/yLo5loe

Happens whenever joining a world. Tried with a blank instance with Fabric API - issue still occurs.

Using Loom 1.10, 1.21.5

Just confirmed with some of my testers that this only occurs in a development environment.

Using the production run configurations confirms this as well.

I have never encountered this while developing the FRAPI and Indigo 1.21.5 ports so I have no idea what would cause this, or what the error even means.

The Fabric API libraries in your crash report are of different versions, which seems likely to cause this kind of problem. Maybe you have other mods in your developer workspace that are pulling in differing (incompatible) versions of Fabric libraries.

The Fabric API libraries in your crash report are of different versions, which seems likely to cause this kind of problem. Maybe you have other mods in your developer workspace that are pulling in differing (incompatible) versions of Fabric libraries.

Maybe? I can try to nuke my global gradle caches - I did test without any mods (ETF etc.) in a dev env and was still getting the issue - so maybe it's just a gradle mess up.

Can confirm it was just a corrupt gradle cache.