Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in D:\Webserver\Apache24\htdocs\testephp\signxml\vendor\symfony\serializer\DataCollector\SerializerDataCollector.php:26 Stack trace: #0 {main} thrown in D:\Webserver\Apache24\htdocs\testephp\signxml\vendor\symfony\serializer\DataCollector\SerializerDataCollector.php on line 26