This is in combination with another 3rd party module that inserts attachment PDF's to our invoice e-mails.
The problem is in Ripen\Postmark\Model\Transport , the parent class getMessage() function does not have access to the protected $message variable and returns null.
Hacked around this by adding a new getMessage() function in Ripen\Postmark\Model\Transport.
This is in combination with another 3rd party module that inserts attachment PDF's to our invoice e-mails.
The problem is in Ripen\Postmark\Model\Transport , the parent class getMessage() function does not have access to the protected $message variable and returns null.
Hacked around this by adding a new getMessage() function in Ripen\Postmark\Model\Transport.