Fatal error: Uncaught Error: Class "Hamcrest\FeatureMatcher" not found in C:\xampp\htdocs\mflux\vendor\hamcrest\hamcrest-php\tests\Hamcrest\FeatureMatcherTest.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\mflux\vendor\hamcrest\hamcrest-php\tests\Hamcrest\FeatureMatcherTest.php on line 18