I can only connect if there are no mods. It's not based on particular mods, remove the "problematic mod" and he will just move on to another one until I removed all mods, even though both me and the server have the exact same files! I've checked! Files are identical, same size, same lines of code. EVERYTHING.
Yet the game won't stop preventing me from playing the game.
And my version of the game and server is 41.77.9.