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VideosError 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 LLN4XlQtdYBYXROKcfwTLIww belongs to a playlist. Check the FAQ of the plugin or send error messages to support.