Context: I loaded into my server and I took damage from a enemy and was kicked out of the server and prompted with a java error regarding FPM mod.

Log (Line 3167):
latest.log

Duplicate of #86, I guess I'll do the hotfix that prevents this from kicking you from the server, but it should be looked into which forge mod causes that packet to be basically corrupted(Since this technically isn't a bug of the FirstPersonMod, but a bug of some Forge Mod).

not sure what it is, everything was working fine until I added 3 new mods...

Which mods are that? Since so far I wasn't able to reproduce it to nail down which mod screws up this packet.

Which mods are that? Since so far I wasn't able to reproduce it to nail down which mod screws up this packet.

I added Bigbrain, Snailmail, and updated a private mod called SimpleDualWielding which is exactly what it sounds, it also changes the cooldown for all items.

I link it as well if you'd like.

Since another person also found this, I guess it's one of the two public mods :D. I'll test it in a few days, currently busy with exams.

Sounds like a deal. If you can't figure out the issue from there, add my discord and I'll send u the private mod by GenZVirus.
It's not a paid mod (against eula anyway.), just a mod that he took down from the curseforge due to there already being a similar mod.