Fatal error: Uncaught Error: Class "Symfony\Component\Filesystem\Tests\FilesystemTestCase" not found in /var/www/html/includes/php-ffmpeg/vendor/symfony/filesystem/Tests/FilesystemTest.php:19 Stack trace: #0 {main} thrown in /var/www/html/includes/php-ffmpeg/vendor/symfony/filesystem/Tests/FilesystemTest.php on line 19