Error type: "Forbidden". Error message: "Project blocked; abuse detected." Domain: "usageLimits". Reason: "accessNotConfigured".
Did you added your own Google API key? Look at the help
Check in YouTube if the id PL6zOCRDX5HUpsx6QZHIT7M1C4MCHOPrAc
belongs to a playlist. Check the FAQ
of the plugin or send error messages to support