For anyone who’s also undergoing the login loop of codeally (codeally redirects back to freecodecamp), I find this solution which works for me.
In short, use Firefox, go to freecodecamp.org, click the shield on the left of the url, turn off the toggle of “Enhanced Tracking Protection”. Then it should be good to go.
Also, if you’re stuck with the “Redirecting back to original site”, try going straight to the codeally website, connect your github account, and then come back to the course.
Hope this can help you!