Trying to load Owo Lib (latest 1.21 Neoforge) alone on version 21.1.186 of Neoforge crashes the game. Downgrading to at least version 21.1.184 resolves the issue entirely.

Log: https://mclo.gs/7W4K9kx

had this issue as well

Can not confirm such on latest version owolib and neo version given

I have the same issue for Neoforge 21.1.191 and "owo-lib-neoforge-0.12.15.1-beta.6+1.21.jar"
No problems with "owo-lib-neoforge-0.12.15.1-beta.3+1.21.jar"
Crash report is below

crash-2025-07-12_21.30.03-server.txt

@uhloin Not the same issue and it pretains to the fact that you need to update Accessories as the version within the Aether I assume is using a older version and owolib updated to remove more Depedency on FFAPI modules, please update accessories to resolve the issue or add FFAPI for the time being