Xfinity account does not have a primary user

I am trying to manage the billing for my Xfinity account, but it appears as if there is no primary user for the account. I am able to sign in using my email address on the Xfinity website, but when I select Billing & Pay -> View Bill & Transaction History, the page states that I do not have permission, as I am only a "Member". When I select Manage Plan -> View & Manage Current Services, it logs a request error to the browser console and loads indefinitely, although previously it stated there was an issue with my account and I would need to contact support. When I select the account menu -> Account and Identity, only a single account is shown for my address, which I expect. From there, when I select Xfinity ID and Security, there is also only one account shown. The phone number I used to start service at my address is the same phone number associated with my user account, although I have previously changed the email address. However, I was encountering the same issue prior to changing the email address. I have tried searching for additional accounts at https://idm.xfinity.com/myaccount/lookup, but I always end up signed back in as the same user. I am encountering the same issues using the Xfinity mobile app.