Stopped working after WP update

Hi Folks!
I got a big surprise upon updating to WP 5.5. Suddenly the galleries don’t display!

My content source is Posts. My post setting is Portfolio.

It’s an unusual problem – it only appears if I’m logged out of your site. When in admin, the galleries work. Maybe you guys didn’t test much with 5.5? ??

Here’s the host of Javascript errors that you get when logged out:

Uncaught ReferenceError: jQuery is not defined
    at jquery.matchHeight.js?ver=1.1.3:17
    at jquery.matchHeight.js?ver=1.1.3:19
layout-gaps.min.js?ver=2.3.0:1 Uncaught TypeError: (0 , window.jQuery) is not a function
    at Object.222 (layout-gaps.min.js?ver=2.3.0:1)
    at e (layout-gaps.min.js?ver=2.3.0:1)
    at Object.221 (layout-gaps.min.js?ver=2.3.0:1)
    at e (layout-gaps.min.js?ver=2.3.0:1)
    at layout-gaps.min.js?ver=2.3.0:1
    at layout-gaps.min.js?ver=2.3.0:1
plugin-isotope.min.js?ver=2.3.0:1 Uncaught TypeError: n is not a function
    at Module.245 (plugin-isotope.min.js?ver=2.3.0:1)
    at o (plugin-isotope.min.js?ver=2.3.0:1)
    at Object.244 (plugin-isotope.min.js?ver=2.3.0:1)
    at o (plugin-isotope.min.js?ver=2.3.0:1)
    at plugin-isotope.min.js?ver=2.3.0:1
    at plugin-isotope.min.js?ver=2.3.0:1
layout-tiles.min.js?ver=2.3.0:1 Uncaught TypeError: o is not a function
    at Object.232 (layout-tiles.min.js?ver=2.3.0:1)
    at o (layout-tiles.min.js?ver=2.3.0:1)
    at Object.231 (layout-tiles.min.js?ver=2.3.0:1)
    at o (layout-tiles.min.js?ver=2.3.0:1)
    at layout-tiles.min.js?ver=2.3.0:1
    at layout-tiles.min.js?ver=2.3.0:1
main.min.js?ver=2.3.0:1 Uncaught TypeError: c is not a function
    at Module.236 (main.min.js?ver=2.3.0:1)
    at e (main.min.js?ver=2.3.0:1)
    at Object.235 (main.min.js?ver=2.3.0:1)
    at e (main.min.js?ver=2.3.0:1)
    at main.min.js?ver=2.3.0:1
    at main.min.js?ver=2.3.0:1

Hope this helps. I await your response. Thanks! Dave