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