Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in C:\Apache24_x64\htdocs\ipad\vendor\symfony\http-kernel\Tests\Fixtures\DataCollector\CloneVarDataCollector.php:18 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\symfony\http-kernel\Tests\Fixtures\DataCollector\CloneVarDataCollector.php on line 18