So i made a modpack on my own and ive recently been playing it with my brother we had no issues on the pack until we added a new mod which caused my game to not let me play with error failed to synchronise
now i have removed the mod from my pc since and even with the old mods my game wont work as its giving the same error even with the old mods ive tried resetting the config files ive tried changing from multimc to minecraft launcher but none work
here is the picture https://ibb.co/3YWGgcc