We have an issue when we are trying to complete shipment.
We have the "email copy of Shipment" box checked. And when we click "submit shipment" we receive these two error messages: "cannot do shipment for the order" and "Invalid security or form key, please refresh the page"
But the shipment is completed and the email copy is sent. I have checked the log and reports folder for any errors but nothing that indicates there is an issue at all.
Anyone that knows what causes this? Is not that bad, but since our client thinks there is something wrong when this is happening.
Any help is appreciated.,