hello,
in orders views, on two sites differents, if I click on the button invoice, I got an url like that : https://www.mysite.com/administrator/index.php?option=com_virtuemart&view=orders&task=callInvoiceView&tmpl=component&virtuemart_order_id=297&layout=invoice&format=pdf&d=36&invoiceNumber=190418GDEP01
but can not see anything, just a blank page with an admin tool bar empty.
switch on all debug and error reporting to see what is failing