Server instant Kick Me : A given capability is null

[RonanNeox]

Hi, I was playing with my brother on a server, we fought a boss from the idolizing mod then I got kicked for no reason and I can't come back. My brother have no issue at all and can still join. We tried to /kill or change my gamemode while i try to connect but i don't even have time as i get kicked instantly.   I have forge up to date for 1.16.5, the server too. almost every mod is up to date (except 3 that  got released today). 
I linked the server logs and my client logs right Here. I usually manage to fix my issues, but I don't get how to deal with this one. Thanks if anyone can help me to fix what's wrong.