Hey Vlad44b,
I took your credentials and tested your shop.
I created an order.
When I change the status to "confirmed" an invoice is being generated in the safe path, with filename "vminvoice_140111acd05.pdf".
I can successfully delete the order in the backend, without any errors.
Message: "Orders successfully deleted."
At this point, the PDF filename is not deleted, but changed to another name "140111acd05_20140111.pdf".
I tried the same in my own VM installation. The same effect. The PDF is only renamed after deletition.
@VM experts: Is this usual?
@Vlad44b: The only thing I changed, was the backend-language to english, and I didn't get such errors, as you stated. Can you confirm this?
Nevertheless, the order is being deleted from the backend order-history, but the pdf is only renamed in the filesystem. Why?
Beside all this: Another interesting thing:
If I switch your FRONTEND language from russian to english, I do not see products an more,
and other messages like "No shipment method has been configurated".
I didn't know, that this is language dependant...
In the end, I think your problems are caused by a broken translation in front- and backend.
I would be interested, why the invoices are only renamed? Perhaps for future reference by the shop owner?