I created a new page using Page Builder and added content, saved, and published. It looks correct. However, now I want to edit the page in Page Builder. It opens up but I can’t edit any of the existing content, add rows, add content, etc. Page Builder is basically not functioning any longer (although it does display).
So the problem here is that the Contact Page template of your theme has a JS code that looks for an element with the ID of google-map. Since it can’t find that on your Contact page, it returns a JS error, which in turn breaks the builder.
I noticed on the native WP editor, the tinyMCE has a button for Google Maps. I tried using that and it gave me a shortcode. I used the shortcode inside the page builder and it renders a map with the ID the JS code is looking for and the issue is no longer. Will you be using a map on your Contact page? If you aren’t, I’d suggest just using the default page template, as I believe that is the only difference between the two(not sure here). Or you could get in touch with the theme authors. You could have them do a check if the content contains an element with that ID first before their JS code runs.