I figured out a solution to the problem (or at least mine). The first thing I did was I made sure my firestick had the latest update. Then I logged into my xfinity account and went to “xfinity ID and passwords.” I have two emails listed (thought I only had one), the one I use daily and a comcast.net one. I also found a username I didn’t know I had. I went back to the firestick, used the username associated with my account since there was only one of those, entered my xfinity password, and was finally able to login to the tv apps!
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