Fatal error: Uncaught Error: Interface "PHPUnit\Framework\MockObject\Stub" not found in C:\xampp\htdocs\kalimark\vendor\phpunit\phpunit-mock-objects\src\Stub\ReturnArgument.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kalimark\vendor\phpunit\phpunit-mock-objects\src\Stub\ReturnArgument.php on line 18