Fatal error: Uncaught Error: Interface 'Prophecy\Promise\PromiseInterface' not found in C:\Apache24\htdocs\vendor.old\phpspec\prophecy\src\Prophecy\Promise\ReturnArgumentPromise.php:23 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\phpspec\prophecy\src\Prophecy\Promise\ReturnArgumentPromise.php on line 23