Getting stuck trying to load into modded servers

So on BeamMp i can join servers with zero mods but when i try to join a server with mods it will download 1 or 2 mods, give me a zip invalid error and then get stuck on the one mod and nothing happens. I have been trying trying to fix this for the passed 4 days and nothing. Its weird i was able to join before and now cant. Ive tried completely uninstalling everything and it still doesnt work. just can only join servers with no mods