I've run into a similar issue. My company uses rclone to mount box. We have Okta as our SSO. As of a couple days ago the mount worked flawlessly but now we get the error:
---------------
Don't worry, your files are perfectly safe. Get in touch with Box support to get assistance with this app. We're here to help.
Error: insecure_redirect_uri
Show Error Details
- response_type=code
- redirect_uri=http://127.0.0.1:53682/
Any help would be appreciated!