Minecraft completly breaks when using the mod, removing it completly fixes the issue. I am running FTB Academy 1.16 with a few performance mods (all of which should be compatible, at least they worked in 1.7 and prior). modlist

I am using modernfix 1.9, updated from 1.7

The LWJFL version is 3.3.1 because I changed it (no reason, changed it back to 3.2.2 now) but after applying the workaround architecture refuses to load, not letting me play anyway.
latest.log

Yup, it works now. Thanks for the quick help.

Oh, betterfpsdist is really a demon.

Try without Performant installed.

Please send your latest.log file when this occurs.

latest.log

Thanks. You can add mixin.perf.faster_texture_stitching=false to config/modernfix-mixins.properties as a workaround for now; that should let you launch and play the game without issues.

Can I ask what launcher you are using?

PrismLauncher

by the local path of the first line in the log.

I wonder why the LWJGL version is so modern then. Anyways, I will add a fix.

The next version of ModernFix will work fine with LWJGL 3.3 for anyone who happens to select it.