Fatal error: Uncaught Error: Interface 'PHPUnit\Framework\MockObject\Stub' not found in E:\xampp\htdocs\key1\vendor\phpunit\phpunit-mock-objects\src\Stub\ReturnStub.php:19 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\phpunit\phpunit-mock-objects\src\Stub\ReturnStub.php on line 19