Uncaught Error when trying to serialise an Enum

[CJDennis]

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no

I'm using Symfony 5.4.14 and getting the following error when trying to serialize an Enum.

jms/serializer 3.18.2

[2023-01-11T16:21:25.005494+11:00] php.CRITICAL: Uncaught Error: Object of class HMRX\CoreBundle\Entity\ClinicPharmacistRelationshipTypeEnum could not be converted to string {"exception":"[object] (Error(code: 0): Object of class HMRX\\CoreBundle\\Entity\\ClinicPharmacistRelationshipTypeEnum could not be converted to string at D:\\server\\Apache24\\htdocs\\hmr\\app\\HMRX_App\\vendor\\jms\\serializer\\src\\GraphNavigator\\SerializationGraphNavigator.php:150)"} []

I noticed there was an update to the serializer today, so I updated it but got an identical error.

jms/serializer 3.21.0

[2023-01-11T21:50:19.735874+11:00] php.CRITICAL: Uncaught Error: Object of class HMRX\CoreBundle\Entity\ClinicPharmacistRelationshipTypeEnum could not be converted to string {"exception":"[object] (Error(code: 0): Object of class HMRX\\CoreBundle\\Entity\\ClinicPharmacistRelationshipTypeEnum could not be converted to string at D:\\server\\Apache24\\htdocs\\hmr\\app\\HMRX_App\\vendor\\jms\\serializer\\src\\GraphNavigator\\SerializationGraphNavigator.php:150)"} []

Steps required to reproduce the problem

1. Serialize data containing an Enum

Expected Result

• JSON data representing the Enum

Actual Result

• An exception is thrown

[scyzoryck]

Hi! Have you enabled Enum support as in documentation?

[goetas]

https://github.com/schmittjoh/JMSSerializerBundle/pull/919