amc+ page cannot be loaded

Hello, I am having an issue with the AMC+ app on my xfinity box, where it will not load the AMC+ app.  It loaded once, but since then it keeps giving me an error, stating "page cannot be loaded" and this happens with any show.  We have a subscription setup directly to AMC+, and it works on other devices except the xfinity boxes. I did try to sign out of the box, restart the box, and clear the cache, but the error still persists.  We do have more than one box as well, but the error still happens there too.

I was advised that my xfinity account may need to be refreshed, so it shows the correct entitlements.  Can this be corrected/worked on?

Thank you!