It appears on the invoice emailed to the customer, but not on the pdf invoice.
I have uploaded a new png logo named invoice_logo.png more or less of the same dimensions of the standard logo.
I have deleted the cache manually and tried to create a new order, but there is no way to make the logo appears on the pdf invoice.
Thanks
It is difficult to say what causes the problem. It can be caused by the file_get_contents() PHP function which is no configured properly on the server or by any third-party add-on. Please contact us via Help Desk system and provide us with FTP access credentials to your server so we can examine the issue in more detail.