Fatal error: Class 'Symfony\Component\HttpKernel\HttpKernel' not found in /var/www/html/dev/spa/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/TestHttpKernel.php on line 20

Call Stack:
    0.0004     237424   1. {main}() /var/www/html/dev/spa/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/TestHttpKernel.php:0