access denied on android phone Samsung S23

After I installed an updated version of the Xfinity app on my Samsung S23 android phone, I am getting a message after I enter my email: Access Denied, You don’t have Permission to Access.   I tried uninstalling the Xfinity app and reinstalling it, restarting my phone but that did not fix the problem.  I also cleared cache and data but that did not help.  I called Xfinity and after speaking with several levels of helpers, they could not fix it either.   They suggested that I go to my cell phone carrier, Verizon, to troubleshoot the problem.  Before I do that, does anyone else have that problem or does anyone have a suggestion on how to resolve it.