Hi,
Thanks ! That's exactly what I needed.
I don't that the error is linked to the update of Joomla. I think it comes from an update of PHP as well as the use of a shipping plugin for an order of your orders listing which has been disabled or uninstalled.
Change the line:
if(method_exists($shippingMethod, 'shippingMethods'))
to:
if(!empty($shippingMethod) && method_exists($shippingMethod, 'shippingMethods'))
in the file administrator/components/com_hikashop/classes/shipping.php and it should prevent this error.
We'll add the change on our end too for the next version of HikaShop.