That is a warning. That should not be causing issues for when you visit your site. Check for other errors in the nodebb log and in your browser console.
Unable to Embed YouTube Using Plugin
Installed NodeBB Youtube Embed Plugin (nodebb-plugin-youtube-embed) and activated it.
But still, the YT video is not embedded. Just showing the plain URL (link).
Is it a compatibility issue ..I'm on NodeBB 1.14.0-12.
Or do I need to go with any other plugin?
Any fix for it?
Try using this one instead (it works for me on latest NodeBB)