Fatal error: Uncaught TypeError: Argument 1 passed to Service\Questionnaire\QuestionnaireService::getInstance() must be of the type string, null given, called in /var/www/html/src/App/src/Handler/ErrorsHandler.php on line 70 and defined in /var/www/html/src/Service/src/Questionnaire/QuestionnaireService.php:189 Stack trace: #0 /var/www/html/src/App/src/Handler/ErrorsHandler.php(70): Service\Questionnaire\QuestionnaireService->getInstance(NULL, Array) #1 /var/www/html/vendor/zendframework/zend-stratigility/src/Middleware/RequestHandlerMiddleware.php(53): App\Handler\ErrorsHandler->handle(Object(Zend\Diactoros\ServerRequest)) #2 /var/www/html/vendor/zendframework/zend-expressive/src/Middleware/LazyLoadingMiddleware.php(46): Zend\Stratigility\Middleware\RequestHandlerMiddleware->process(Object(Zend\Diactoros\ServerRequest), Object(Zend\Stratigility\Next)) #3 /var/www/html/vendor/zendframework/zend-stratigility/src/Next.php(60): Zend\Expressive\Middleware\LazyLoadingMiddleware->process(Object(Zend\Diactoros\ServerRequest), Ob in /var/www/html/src/Service/src/Questionnaire/QuestionnaireService.php on line 189