Fatal error: Uncaught TypeError: Return value of Slim\Middleware\ErrorMiddleware::handleException() must be an instance of Psr\Http\Message\ResponseInterface, null returned in /srv/http/kashi/frontend/exhibition_trade_common_api/vendor/slim/slim/Slim/Middleware/ErrorMiddleware.php:127 Stack trace: #0 /srv/http/kashi/frontend/exhibition_trade_common_api/vendor/slim/slim/Slim/Middleware/ErrorMiddleware.php(109): Slim\Middleware\ErrorMiddleware->handleException(Object(Slim\Psr7\Request), Object(PDOException)) #1 /srv/http/kashi/frontend/exhibition_trade_common_api/vendor/slim/slim/Slim/MiddlewareDispatcher.php(147): Slim\Middleware\ErrorMiddleware->process(Object(Slim\Psr7\Request), Object(class@anonymous)) #2 /srv/http/kashi/frontend/exhibition_trade_common_api/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): class@anonymous->handle(Object(Slim\Psr7\Request)) #3 /srv/http/kashi/frontend/exhibition_trade_common_api/vendor/slim/slim/Slim/App.php(215): Slim\MiddlewareDispatcher->handle(Object(Slim\Psr7\Request)) #4 /srv/htt in /srv/http/kashi/frontend/exhibition_trade_common_api/vendor/slim/slim/Slim/Middleware/ErrorMiddleware.php on line 127