playlistIdparameter cannot be found." Domain: "youtube.playlistItem". Reason: "playlistNotFound". Location type: "parameter". Location: "playlistId".
Did you added your own Google API key? Look at the help.
Check in YouTube if the id PLXZF4yNxy8jRGbIO0U2s_qmV3f_31jONR belongs to a playlist. Check the FAQ of the plugin or send error messages to support.