Amaaaa1337

I played with a friend and initially everything was fine, but then we removed the mods because others did not want to play with them. Later we installed everything again and a problem started that all our mods are the same, but we can’t connect. also the bin folder and date are also the same. I don’t understand what’s wrong and what to do so that I can play with a friend with mods again. When trying to join a friend in the game, the loading screen is 0%, then a white screen and going to the main menu. please help me find the answer what to do.