I downgraded to 1.19.4 with same mods, but removed these:
Blossom
Create and its addons
Jade (replaced with WTHIT)
Slash and its addons
JoJo
Twilight Forest
Next Spring
Botania
Inventory pets
No issues yet, but I'm trying to add previously mentioned mods to this build so i can figure out if it's forge 1.20.1 problem or mod's
That's why i went here. It just instantly kicks you out. Also there's another problem with this modpack. If you're lucky enough to join, after some time (around 20-40 mins) server crashes completely with watchdog error. No log mentions aswell.