spinning wheels no pictures

I am completely out of my comfort zone with this but ran the Javascript Console and saw

jquery.colorbox-min.js:7 Uncaught Reference Error: jQuery is not defined
https://wordpress.com/e-201510.js%22%20type=%22text/javascript/ Failed to load resource: the server responded with a status of 404 (Not Found)

Do I need to learn javascript to resolve this?
https://www.everykid.on.ca/1-2

love the demos of this and it would really enhance the look of the website I provide as a volunteer to our community collaboration working to improve outcomes for our kids.

https://www.ads-software.com/plugins/creative-image-slider/