Fatal error: Uncaught Error: Class 'Prophecy\Exception\Doubler\DoubleException' not found in /opt/lampp/htdocs/kuesioner/vendor/phpspec/prophecy/src/Prophecy/Exception/Doubler/MethodNotExtendableException.php:5 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/phpspec/prophecy/src/Prophecy/Exception/Doubler/MethodNotExtendableException.php on line 5