Hi there,
Thank you for your response. I did spend a lot of time on this case and unfortunately, I should say the hosting service provider does not have enough privileges to run our theme correctly.
There are many factors involved but it seems the hosting restricts accessing to some URLs, it even restricts access to our server to check for updates as you can see in Pro > Overview page:
<img src="//tco-forum-uploads.s3.amazonaws.com/original/2X/6/6a7620a64a318376f5cbabeb83a0553c850c0e65.jpg" width="333" height="81">
Also, the error which I see in the browser developer toolbar when I want to add anchor tag in text element is the setHTML, which comes from the tinymce editor Javascript file which we use in this case:

That shows even the TinyMCE plugin which is the default editor of the WordPress is restricted and the javascript file can not trigger the setHTML.
I strongly suggest that you consider using other hosting service to use our software.
Thank you for your understanding.