Fatal error: Uncaught Error: Interface "Prophecy\Promise\PromiseInterface" not found in I:\www\pvcUtils\vendor\phpspec\prophecy\src\Prophecy\Promise\ReturnPromise.php:22 Stack trace: #0 {main} thrown in I:\www\pvcUtils\vendor\phpspec\prophecy\src\Prophecy\Promise\ReturnPromise.php on line 22