Fatal error: Uncaught Error: Class "Symfony\Component\Process\Process" not found in C:\xampp\htdocs\mtamp3\vendor\norkunas\youtube-dl-php\tests\StaticProcess.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\mtamp3\vendor\norkunas\youtube-dl-php\tests\StaticProcess.php on line 16