Multiple mods problem

i installed multiple mods on my server, and it seems the server isnt working with all of them, i always get an error from disconnected to failed to verify username. i truly tried everything and i dont know what to do

also if you want to try and join the server IP is Anermizzz.aternos.me

hey, thanks fro sending me the article but i always have cracked mode on, so i think its either my game or the amount of mods i installed there

It got fixed, now it say disconnected every time I try to load it, but when I played those mods on singleplayer it worked just fine, also I got a mod that should generate dungeons but no dungeons appear for some reason