Mandrill email Queue - Fatal Error

The Cron job to send emails on my installation is reporting a fatal error…



Catchable fatal error: Argument 1 passed to MauticEmailBundleEntityDoNotEmail::setEmail() must be an instance of MauticEmailBundleEntityEmail, null given, called in [my install directory]/app/bundles/EmailBundle/Model/EmailModel.php on line 1129 and defined in [my install directory]/app/bundles/EmailBundle/Entity/DoNotEmail.php on line 115



Mails in the spool directory are not sent.



Any ideas?

The Cron job to send emails on my installation is reporting a fatal error…

Catchable fatal error: Argument 1 passed to MauticEmailBundleEntityDoNotEmail::setEmail() must be an instance of MauticEmailBundleEntityEmail, null given, called in [my install directory]/app/bundles/EmailBundle/Model/EmailModel.php on line 1129 and defined in [my install directory]/app/bundles/EmailBundle/Entity/DoNotEmail.php on line 115

Mails in the spool directory are not sent.

Any ideas?