MODRIČA: VIDEO NOVOSTI

Error type: "Internal Server Error". Error message: "Backend Error" Domain: "global". Reason: "backendError".

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

Check in YouTube if the id PLftesi3hzfDsvpYyzIkZ8ZqtSDa8qJfnX belongs to a playlist. Check the FAQ of the plugin or send error messages to support.