Have that problem.
The server encountered an internal error and was unable to complete your request.
Community connector error: When fetching the post_link_clicks metric, you must split by post-level dimensions. If the problem persists report an issue with the connector owner.
Error ID: af674bbc
Can you please give solution?
as the error says, if you have selected a post related metric in to your query, you need to have at least one of the split by dimensions post related as well to get any results from the data source.