Not using https to load script

@simondh – Not sure what you mean, is there a specific asset your discussing? We use built in WP functions to generate file paths.

This is where we define the root url of all of our assets: https://github.com/PopupMaker/Popup-Maker/blob/2842a10870df26633a354ad2e624025c6a9e9df6/popup-maker.php#L193

As you can see used here to register our front end JS urls:
https://github.com/PopupMaker/Popup-Maker/blob/master/classes/Site/Assets.php#L60.

Hope that helps. If your issue is resolved please take a moment to rate and review the plugin or support.

If you still need help please message us directly at https://wppopupmaker.com/support/.

It is also curious that your site loads our CSS from a CDN, but not the JS file.