I get community conector error for all the metrics in Linkedin Ads. I already tried refreshing the data source and authorised connection.
I've deleted all the linkedIn tokens manually from the backend to reset this. You should be able to go back to the connector and log back in.
Also make sure in future cases that you use the second option when re-authorizing to "add a new user", as described in this article, so that it properly resets the expired token, which is the most common reason for errors with the LinkedIn connectors.