Zoom all of a sudden not working

Hello all, so out of nowhere I have been unable to join my schools meetings that I've been able to join for the last 2 semester without an issue. It buffers forever, never loads, then asks if I want to join from my browser and the same thing happens. Yesterday after umpteenth times of trying it eventually worked from my browser but it was completely random as today I am getting error messages 5003 and 401 whenever I try to join. I've flushed my DNS, cleared my cache and cookies, turned the firewall off. Tried everything they said online and I am unable to receive live chat for some reason. Does anyone have a fix for these issues? I have two classes today that I'm halfway through missing. Thank you.