I've been stuck with a problem on 1.16.4, and as any other problem, the game simply doesn't load and it crashes. I have immersive portals mod and also Pehkui on it (last version of Pehkui); Any help is welcome.

ps: Also, here's the logs (yes i was using inertia, and?)
2021-04-12-6.log

"Client"s used for cheating are not supported here.

Also: Setting user: DonRaviollone
That username is not in use by any paid MC accounts. Piracy will not be tolerated.