Fatal error: Class 'Symfony\Component\CssSelector\Tests\Handler\AbstractHandlerTest' not found in /var/www/html/dev/spa/vendor/symfony/css-selector/Symfony/Component/CssSelector/Tests/Parser/Handler/StringHandlerTest.php on line 20

Call Stack:
    0.0004     243288   1. {main}() /var/www/html/dev/spa/vendor/symfony/css-selector/Symfony/Component/CssSelector/Tests/Parser/Handler/StringHandlerTest.php:0