Fatal error: Uncaught Error: Class "Jose\Component\Signature\Serializer\Serializer" not found in C:\xampp\htdocs\soli\vendor\web-token\jwt-library\Signature\Serializer\JSONFlattenedSerializer.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\soli\vendor\web-token\jwt-library\Signature\Serializer\JSONFlattenedSerializer.php on line 15