I have logged in with your staging site and I do not see any JS errors. I cleared the cache first by the way before testing the site. I went back to your screenshot and have taken a closer look. It seems that the Nav Menu Addon for Elementor is the culprit. I would highly suggest that you disable W3 Total cache and also do a text for plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
Hope this helps. Please let us know how it goes.