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