Xfinity error message: "Sorry, there was an error loading this page. Your account has not been charged."

There's an issue with the Xfinity login page that is causing this problem. Xfinity has informed us that they're aware of the issue and are actively working to resolve it. They suggest that you close out of the app, wait 10-15 minutes and try again. Please contact Xfinity directly if you're still getting the error.