You see

What to do

invalid_client

Contact Seedr support.

cannot open configuration

The config path is missing or not readable. Check the path and the file permissions.

Credential or state errors

Fix the ownership or permissions. The guide lists 0700 for the state folder and 0600 for its files.

revoked

Access was revoked. Run pair again.

The Seedr Connector screen in Settings shows each connector's online status and when it was last seen. If you need more help, use the ticket form. The GitHub guide has more detail.

For anything else, submit a support ticket.