Can't access 'My Account' on web or in Xfinity app.

I'm able to log into my Xfinity account on web, but if I try to access anything related to 'My Account' I get an error "Sorry, This Isn’t Working Right Now Please reload the page and try again.". When I try to use the Xfinity app, I log in, it begins to load and loops me back to the login screen. If I try to use Xfinity Assistant for support it just loops through the login process also. The problem persists across multiple web browsers and platforms.

I've had this problem since I opened my account in late October and contacted Customer Support over the phone where they thought they fixed it, but the issue still remain unresolved. This is very similar to the problem another customer was having in this thread: https://forums.xfinity.com/conversations/signin-and-account-management/cant-access-my-account-on-myxfinitycom-or-myaccount-app/602db105c5375f08cd4201dd