Fatal error: Uncaught Error: Interface "PHPUnit\Framework\SelfDescribing" not found in E:\xampp\htdocs\key1\vendor\phpunit\phpunit-mock-objects\src\Stub.php:20 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\phpunit\phpunit-mock-objects\src\Stub.php on line 20