Issues since power outage

Hello, 

I am having issues with my home wifi connection since power was restored (huge outage in capitol hill). I am getting this message: The network you're trying to join has security issues.

For example, the login page may not belong to the organization shown.

CONTINUE ANYWAY VIA BROWSER

VIEW CERTIFICATE

And nothing will load. I am also getting warnings about potential hackers. Please help me ASAP as I am running out of data of its impossible to reach a non-robot Xfinity employee by phone. I was also transferred to bulk this month and I had the incorrect address on file for a year and a half prior (my old address) so could this change also be part of the issue?

Thank you