A rendering error occurred: Cannot read properties of null (reading 'fields').

I am not able to access my latest bill nor the billing portion of the website from my PC. The page will either show nothing at all or I get the message: "A rendering error occurred: Cannot read properties of null (reading 'fields')." Lately, it seems portions of the Xfinity site are not operating smoothly or at all. 

And yes, I have tried from the Android app on my phone - and when I try to see my bill, I just get a white screen. 

I would appreciate any thoughts or suggestions. Thanks!