I've been an Xfinity customer for about 20 years now. I'm trying to sign into Xfinity to check my email on my MacBook Air, using Safari. My OS is up to date. I'm able to check email via the Xfinity app on my phone. This is what I see when I try to access the Xfinity website:

Access Denied

You don't have permission to access "http://www.xfinity.com/hub" on this server.

Reference #18.a96ad917.1756664277.a62936b2

https://errors.edgesuite.net/18.a96ad917.1756664277.a62936b2