This is probably a compatibility issue because I have a dozen other mods.

If you wanna know what mods I use let me know

Just experienced the same issue. I'm using Starlight in ATM 9. It was working fine up until last night. Then today the instance wouldn't load. I've attached what i think is the correct log. If not I can get something else. FWIW the last mod I was playing with was EnderIO.
debug-2.log

Without providing any logs or mod list we won't be able to help you ^^"

Yeah seems to be EnderIO's Flywheel Compat I think

Duplicate of #197