Using Fen Light right now It was updated couple of days ago. It is the only addon I can find that is back working with Real debrid right now. My friends found that if they uninstalling, reinstall, reauthorization and they were back to normal. Make sure you have latest version from Tikipeter.

You know that the developer changed how fen light is installed awhile ago? Instead of installing a repo, he just provides a zip installation file available on the github packages location.