Game crashes when the inventory is opened (1.20.1(forge))

[MrMattes]

My game 1.20.1 crashes when I play in multiplayer on an aternos server and only in multiplayer when I try to open the inventory in creative. In Singleplayer the inventory opens. (in singleplayer i have the same mods as on the server) If it is important: we have a few other mods on the server if that is important which then just write that. I will list them then.