I am encountering an OAuth error: invalid_request: The redirect_uri is missing.
I have added the correct redirect URLs to the whitelist in the partner accounts. The issue occurs when a user logs in for the first time; they are not redirected to the specified URL. However, if the user attempts to log in again, the redirection works as expected.
What scopes are you requesting, and do you have permissions set up that cover all the scopes?