Fatal error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /var/www/html/dev/spa/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/Fixtures/ExtensionLoadedBundle/DependencyInjection/ExtensionLoadedExtension.php on line 18

Call Stack:
    0.0004     231992   1. {main}() /var/www/html/dev/spa/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/Fixtures/ExtensionLoadedBundle/DependencyInjection/ExtensionLoadedExtension.php:0