"We're sorry. Something went wrong. Please try again in a moment"

Same issue when trying to access my statements. Contacted support and they told me they'd fix it but still not working.

Same problem with my Galaxy Note 10 (and previously with my Note 8). Been going on for years. If I uninstall, reinstall it  usually works long enough to read important messages. If Xfinity can't fix this, is there an alternative email app that would work?

I have been having the same issue for the last six months.  I get the same message whenever I try to access my bills via the iPhone App, or webpage from all of the different browsers.  I have had chat conversations multiple times and tickets have been opened with engineering but nothing ever changes.  It is becoming very frustrating since I am paying my bill each month with autopay, but have no idea what Xfinity is billing me for!  

same mine hasn't worked for months

Same. Worked when I first got it, but any time I try to check my network now, it says that "sorry" message too. I've tried resetting the router/modern and uninstalling and reinstalling the app with no luck.