doctrine - Symfony 4 Embedded form

Question

The class 'DoctrineORMPersistentCollection' was not found in the chain configured namespaces OnlineCareApiBundleEntity

DoctrinePersistenceMapping
MappingException

Embedded Form Getting Errors

When Form Submit that time getting exception errors

$ems = $this->getDoctrine()->getManager();                            
$ems->persist($objProfile);                            
$ems->flush();

Answer 1

等待大神答复