Minecraft 1.12.2
Forge 14.23.5.2859
Lootr 0.6.2

I am creating a modpack with the following mods:
modlist.txt

Recently, when I enable Lootr, the modpack fails to start. It works perfectly fine without Lootr.
Here's the latest.log:
Client:
latest.log

Server:
latest.log

It seems like the error is caused by the following:

[02:44:15] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in lootr-1.12.2-0.6.2.jar. This is not recommended, @Mods should be in a separate jar from the coremod.
[02:44:15] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.RuntimeException: An error occurred trying to configure the Minecraft home at /home/tw1zzler/.local/share/PrismLauncher/instances/The Brilliant Expanse/minecraft for Forge Mod Loader

Let me know how else I can help solve this issue.

Please install MixinBooter as outlined on the CurseForge page multiple times.

EDIT: To clarify, if you read further through that crash report you'll see what the issue is:

Caused by: java.lang.NoClassDefFoundError: zone/rong/mixinbooter/IEarlyMixinLoader

That was incredibly stupid of me, I'm really sorry for wasting your time. Thank you.