Do not bookmark the "Authentication Required" page
in your browser. To assure you can log in from a bookmark,
If you encounter a concern in Canvas, for example: can't submit an assignment, upload a file, reply to a discussion post, here are two things you can try.
Clear the History in your web browser: We're amazed at how often this resolves an issue in Canvas.
Try a Different Web Browser: Issues can often be resolved with a different web browser, such as Firefox or Chrome. Do a quick Internet search to find where to download a new browser.