Process completed with exit code 255.

<error>Child process error</error> (exit code 255): PHP Fatal error: Class StfalconStudio\ApiBundle\Serializer\Normalizer\ConstraintViolationListNormalizer contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Symfony\Component\Serializer\Normalizer\NormalizerInterface::getSupportedTypes) in /home/runner/work/ApiBundle/ApiBundle/Serializer/Normalizer/ConstraintViolationListNormalizer.php on line 23 Fatal error: Class StfalconStudio\ApiBundle\Serializer\Normalizer\ConstraintViolationListNormalizer contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Symfony\Component\Serializer\Normalizer\NormalizerInterface::getSupportedTypes) in /home/runner/work/ApiBundle/ApiBundle/Serializer/Normalizer/ConstraintViolationListNormalizer.php on line 23