It’s working fine now, but I didn’t do anything different. It wasn’t just a one-time thing either. I got the same error on the 26th, but figured I’d just try it again the next day and surely it would be fixed, but it wasn’t. I can’t believe I was the only person having this problem for two days. Did the server get rebooted? The error came from a server, not my browsers. Surely a server admin can look into the event logs and see the errors and maybe determine the cause. Anyway, it’s working now.