Authentication Server Issues

Failure to connect to server:
Failed to login: The Authentication Servers are currently down for maintenance.

I have tried restarting my computer, changing my IP, restarting my router. But I am not overly tech savvy... So not a whole lot I can try. It is my husbands purchased realm and he is also having the same error. We run off the same internet.

I run on Windows 7, he runs on Windows 10