Error: Warning: Invalid argument supplied for foreach() in /public_html/plugins/vmcustom/stockable/stockable.php on line 227

This error occurs when you have the Custom, stockable variants plugin in VirtueMart 2.0 enabled for one of the products or all the products on the page where you get the error.

In order to fix this, you will need to remove this plugin from the product/s where the product does not make use of this plugin or does not have any variants/child products assigned to the Custom, stockable variants plugin.