Cannot connect to unofficial server on a different computer

So, I have two roommates and they both have gaming PCs that they let me use. One is better than the other. The one that runs ark with potato graphics can log into my unofficial server just fine, but if I try to play on the other computer it fails to join. I'll put in the password, and it just stops and goes back to the join-create-mod screen. It otherwise can join other servers just fine.

I've uninstalled and reinstalled ark and the mods on the computer, didn't make a difference. Am I just not able to use a different computer?