Fatal error: Uncaught ReflectionException: Class PHPUnit\Framework\Constraint\Constraint does not exist in /home/discovergreece/public_html/vendor/symfony/phpunit-bridge/ConstraintTrait.php:16 Stack trace: #0 /home/discovergreece/public_html/vendor/symfony/phpunit-bridge/ConstraintTrait.php(16): ReflectionClass->__construct('PHPUnit\\Framewo...') #1 {main} thrown in /home/discovergreece/public_html/vendor/symfony/phpunit-bridge/ConstraintTrait.php on line 16