Hi,
When I open the page to edit a product in HikaMarket, I got the javascript error
Uncaught TypeError: Cannot set property 'html' of undefined
For the call on something about tooltip in the file "/plugins/system/t3/base/js/script.js"
// overwrite default tooltip/popover behavior (same as Joomla 3.1.5)
$.fn.tooltip.defaults.html = true;
$.fn.popover.defaults.html = true;
The problem is that error stop the rest of the javascript scripts in your pages. So it break a lot of features, like the drag & drop system in HikaMarket (that's why you can see the file selection field in the page, the script does not hide it).
The best is to fix the T3 template so it will not impact HikaMarket anymore.
if($.fn.tooltip.defaults)
$.fn.tooltip.defaults.html = true;
if($.fn.popover.defaults)
$.fn.popover.defaults.html = true;
I hope that there is other javascripts errors after that.
Regards,