DefaultParcelType.php on line 62 Fatal error

[nordhagen]

When I deploy Craft with the Postmaster plugin to stage server I get this error in the browser when attempting to save a new entry that triggers a new campaign monitor campaign.

DefaultParcelType.php on line 62 Fatal error: Cannot access protected property Craft\Plugins\Postmaster\ParcelTypes\DefaultParcelType::$parcel in […]/craft/plugins/postmaster/core/parcel_types/DefaultParcelType.php on line 62

I see in the affecting line that there is indeed a protected property being accessed. DefaultParcelType.php, line 62:

$parcelType->parcel->send($obj);

BaseParcelType.php, line 13:

protected $parcel;