Hi!
After much unexpected struggle with our system I finally managed to get it to show me a error message, upon the first order submit I got two lines of
Warning: Invalid argument supplied for foreach() in /.../administrator/components/com_hikashop/helpers/checkout.php on line 379
Warning: Invalid argument supplied for foreach() in /.../administrator/components/com_hikashop/helpers/checkout.php on line 379
Also in the backend in "VAT" => "Manage Rates" I get lots of these, although I don't know if they are related to the other issue.
Notice: Undefined index: VAT Exempt in /.../administrator/components/com_hikashop/views/tax/view.html.php on line 160
Notice: Trying to get property of non-object in /.../administrator/components/com_hikashop/views/tax/view.html.php on line 160