Catchable fatal error: Argument 1 passed to Stnu\EduBundle\Entity\Deal::setUser() must be an instance of Stnu\UserBundle\Entity\FrontendUser, string given, called in /home/ktvkennisn/domains/ktv-kennisnet.nl/src/Stnu/EduBundle/Controller/DefaultController.php on line 1624 and defined in /home/ktvkennisn/domains/ktv-kennisnet.nl/src/Stnu/EduBundle/Entity/Deal.php on line 583