Fatal error: Class 'Symfony\Component\Process\Process' not found in /var/www/html/dev/spa/vendor/symfony/process/Symfony/Component/Process/PhpProcess.php on line 28

Call Stack:
    0.0004     242288   1. {main}() /var/www/html/dev/spa/vendor/symfony/process/Symfony/Component/Process/PhpProcess.php:0