Gravity Forms not loading under https, jQuery is not defined

I am using Gravity Forms on my WordPress site, and so far so good. The problem is I have made the page secure (https/SSL), and this is making the form not to work.

It looks like the issue is how the site is trying to load jQuery. There are 23 JS errors on the page, which seem to be due to a failed jQuery load "Uncaught ReferenceError: jQuery is not defined".

If I go to the page where the source is trying to pull the jQuery file, you’ll see the error:https://code.jquery.com/jquery-1.7.1.min.js?ver=3.4.2

Screenshot of the error:

^{click to enlarge}

And this screenshot is the reference in the page source:

So I have been told I’d want to look into that – that’s where the ultimate issue is, but I don’t really know what to do next.

Is it failing because of Gravity Forms, the HTTPS plugin from WordPress, my SSL certificate…?