On 20-21 June Google changed policy, so starting with Chrome 50, Chrome no longer supports obtaining the user’s location using the HTML5 Geolocation API from pages delivered by non-secure connections.

This means that the page that’s using the Geolocation API call must be served from a secure context such as HTTPS.

See this article for details: https://developers.google.com/web/updates/2016/04/geolocation-on-secure-contexts-only

This information is important also, because DJ-Classifieds Joomla ads extension uses HTML5 Geolocation for user location.

Free SSL Certificate

If you need a free SSL Certificate, you can get it from here: https://letsencrypt.org/

Additional info

DirectAdmin has "Let's encrypt" support from a couple of months and cPanel is about to release the update of panel service for these certificates soon.

There is also a free alternative from StartCom.

They offer free SSL certificates and free email encryption certificates for worldwide subscribers.
There are currently more than 400,000 websites secured by StartCom SSL certificates in order to secure the website confidential information.