I have also written to our went host to investigate the 'connection issues', please response below:
I've done some research and it appears that your site is actually requesting a page that doesn't exist or is incorrectly configured within the 'X' theme's page.
We are getting a 404 page not found response from there server, everything on our end appears to be working correctly.
Please contact your plugin developers and advise them of this.
added &x-verbose=1 to the end of the request and the site showed the HTTP response:
Themeco Apex | Error (404)
font-family: Roboto, sans-serif;
font-size: calc(10px + 1.25vw);
-webkit-flex-flow: column nowrap;
flex-flow: column nowrap;
It seems as though the page you're trying to access does not exist or has been moved.
Please click the back button in your browser and try your action again.
string(9) "Not Found"