Javascript Error and Arabic Search Results not loading

Hello,

I am using Listable theme for site zoqaq.com, and it is 100% compatible with WPML Plugin (which is used for translation). I use two languages English and Arabic. When I try to make a search in Arabic other than the default one (English), using [jobs] shortcode, search page doesn’t load with results. Also, when switching Categories (in the main menu) from English to Arabic, results don’t show up in Arabic Language Only. The website in general is working for other pages and menus, the Only issue I’m having is the search results not showing because there is a Javascript error, and when I inspect the page, it shows

Mixed Content and requested an insecure XMLHttpRequest endpoint ‘http://jm-ajax/get_listings/’. This request has been blocked.

And there is an error at ajax-filters.min.js?ver=1.29.0:1

I contacted WPML support, and they told me that the issue is with WP Job Manager, and I have to fix the JavaScript error in order for them to inspect the site and make sure that the search results in Arabic works fine.

What could be wrong? and 
How I could fix that?

Thanks,
Zoqaq

The page I need help with: [log in to see the link]