Not working and get console error

Hi guys,

I have set the plugin up and added the shortcode to the page above, but when I click the button it doesnt appear as a popup, instead a s a full page.

Im also getting a console error:

Uncaught TypeError: jQuery(…).YouTubePopUp is not a function
<anonymous> https://www.welshmanwalking.co.uk/wp-content/plugins/video-popup/js/YouTubePopUp.js?ver=1729080709:11

The page I need help with: [log in to see the link]