Fatal error: Uncaught Error: Class "Hamcrest\AbstractMatcherTest" not found in C:\xampp\htdocs\vendor\hamcrest\hamcrest-php\tests\Hamcrest\Type\IsArrayTest.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\hamcrest\hamcrest-php\tests\Hamcrest\Type\IsArrayTest.php on line 4