Hello,
Do you have a SEF extension ?
The problem is that the module is trying to refresh itself but, for an unknown reason, the Joomla routing is nor performed at it should and the result you have in not the HikaShop module content.
The URL is (I removed your domain name) :
/crystals-minerals/product/cart/module_id-614/module_type-cart/return_url-aHR0cHM6Ly9kZXYudmVzaWNhLm9yZy9jcnlzdGFscy1taW5lcmFscy9wcm9kdWN0L2luZGlnby1nYWJicm8tb2JlbGlza3Mtc3RhbmRpbmctcGlsbGFycy9jYXRlZ29yeV9wYXRod2F5LTc4/tmpl-component
Regarding the result the URL is giving, I suppose the problem is related to a SEF extension. But it can also be a security plugin or a system plugin.
Regards,