Hi,
We got the file.
The only error I see in it is this one:
PHP Fatal error: Call to undefined method JDocumentRaw::getHeadData() in /home/portalge/public_html/templates/yoo_eat/warp/systems/joomla/layouts/head.php on line 132
but since it comes from your frontend template, I don't see why it would be linked to the problem.
So the problem is not a fatal error in PHP. Maybe there is some kind of security module in your apache server doing that.
Anyway, an easy way to circumvent the problem is to directly upload the file in media/com_hikashop/upload/safe/ via FTP and then use the other button next to the upload button to enter the filename of your file in the file popup so that the file gets linked to your product.