Error type: "Forbidden". Error message: "The referrer,status&playlistId=PLDqFIqKrz4fy2b10bYdFmFcMz0ZriRcuO&maxResults=15&key=AIzaSyAbxDdP1N7ITWWXdyUkbIJfRyhuyyRuhzM does not match the referrer restrictions configured on your API key. Please use the API Console to update your key restrictions." Domain: "usageLimits". Reason: "ipRefererBlocked".

Did you added your own Google API key? Look at the help.

Check in YouTube if the id PLDqFIqKrz4fy2b10bYdFmFcMz0ZriRcuO belongs to a playlist. Check the FAQ of the plugin or send error messages to support.