Fatal error: Uncaught Error: Class "Symfony\Component\Cache\Adapter\AbstractAdapter" not found in C:\xampp\htdocs\ffmpeg\vendor\symfony\cache\Adapter\PhpFilesAdapter.php:25 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ffmpeg\vendor\symfony\cache\Adapter\PhpFilesAdapter.php on line 25