Error type: "Forbidden". Error message: "Project 679703669424 is not found and cannot be used for API calls. If it is recently created, enable YouTube Data API by visiting https://console.developers.google.com/apis/api/youtube.googleapis.com/overview?project=679703669424 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry." Domain: "usageLimits". Reason: "accessNotConfigured". Location type: "". Location: "".

Check in YouTube if the id PLhhcW0vJpM3fNbA23V4o3JjzT-ocMya-B belongs to a playlist. Check the FAQ of the plugin or send error messages to support.