TCPDF ERROR with the payment gateway image

[Zeyckler]

Hello,

I have investigated in my installation why doesn't send the order confirmation emails, and after few days, I discovered that the system is not sending email because the URL of the image associated to the payment gateway.
In my case the error that shows is like this:
TCPDF ERROR: [Image] Unable to get image: https://subdomain.domain.net/images/stories/virtuemart/payment/paypal.jpg

But when I edit directly the URL of the image of the order in the database removing the domain and leaving the relative URL, it finally generates invoices successfully.

How I can fix it?

Thanks, best regards.