I have recently purchased and set up an X-store child theme on a new site. There is an issue on the Checkout page with the option: Returning customer? Click here to login
When you click on this option, the login form does not reveal itself. It just does nothing.

I checked the dev tools on Chrome and do see the markup. It shows an inline style of display: none; which I assume is supposed to change to display: block; when the toggle is clicked.

I also checked the console for any JS errors but I did not see any.

It’s like the jQuery function to toggle that div is missing from the scripts. Any ideas on how to fix this?