Fatal error: Uncaught Error: Class "Prophecy\Exception\Doubler\DoubleException" not found in /home/oyaagyug/public_html/vendor/phpspec/prophecy/src/Prophecy/Exception/Doubler/ReturnByReferenceException.php:14 Stack trace: #0 {main} thrown in /home/oyaagyug/public_html/vendor/phpspec/prophecy/src/Prophecy/Exception/Doubler/ReturnByReferenceException.php on line 14