Fatal error: Uncaught Error: Class "PHPUnit\Framework\Constraint\Constraint" not found in C:\xampp\htdocs\mflux\vendor\symfony\dom-crawler\Test\Constraint\CrawlerSelectorCount.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\mflux\vendor\symfony\dom-crawler\Test\Constraint\CrawlerSelectorCount.php on line 17