streamsaver: Apple TV+

I subscribed to the screensaver package for Netflix, Peacock, and Apple TV+ a few months.  Everything was working fine until two weeks ago.  I went to enter the Apple TV+ application, but didn't get the normal sign in page.  Instead, a gray screen came up instructing me to sign in to my Apple TV+ account.  I followed the instructions to go to the Apple website and follow the instructions.  Once there, I received a message that my account was already signed on.  I went back to Xfinity to open Apple TV+, but still just got the gray screen telling me that I had to log in.  I tried to troubleshoot and to re-start  my system, but nothing worked.  The interesting thing is:  if I leave Xfinity and just use my smart TV, I CAN access Apple TV+!  I really think I should be able to access Apple TV+ through Xfinity like I used to do.  I am sure that someone must have the solution to my issue.  Thanks in advance.