Fatal error: Uncaught Error: Interface 'League\Fractal\Serializer\Serializer' not found in D:\svn\bitfx\vendor\league\fractal\src\Serializer\SerializerAbstract.php:18 Stack trace: #0 {main} thrown in D:\svn\bitfx\vendor\league\fractal\src\Serializer\SerializerAbstract.php on line 18