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