Broken jQuery

Hi,

I updated UnderStrap to the latest version but it broke my site. The only thing that was showing was the nav bar with logo and external links. Everything else was missing.

So I had to roll back from a previous backup and now my jQuery is not loading properly and keeping certain plugins from loading. You can see the errors in the console on the link provided.

I have a scroll button at the bottom that should load (I also uninstalled and reinstalled and it did not fix the issue, so this tells me it is a theme problem) and under the Additional Projects section there should be a Huge-IT Portfolio that loads but all that is showing is the loading icon.

How can I upgrade to the new theme and ensure it doesn’t break my site (I use a child theme) or replace the jQuery in my current theme.

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