Fatal error: Uncaught Error: Class 'PHPUnit\Framework\Constraint\Constraint' not found in D:\xampp7\htdocs\www\nbkm\show_pe\vendor\laravel\framework\src\Illuminate\Testing\Constraints\CountInDatabase.php:9 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_pe\vendor\laravel\framework\src\Illuminate\Testing\Constraints\CountInDatabase.php on line 9