I swapped out lithium for optifine (latest version) and optifabric. and it crashes the game.

edit: added crash log
latest.log

Okay, so... you swapped out the server-side (TPS) performance mod that generally works fine with other mods for the client side (FPS) performance mod that generally fucks up other mods?

If you want a specific shaderpack, just use Iris and the compatible version of Sodium. If you just want shaders in general, take a look at Canvas. If all you want is client-side performance, Sodium does it better and doesn't screw up other mods in the process.

You got tutorial on official AOF discord. Please check that before creating the issue ticket.

Join:
https://discord.gg/e23tPrPZ

Given that optifine is no longer compatible with the pack and we recommend using iris for shader support, I'm closing this issue.