Fatal error: Uncaught TypeError: Argument 1 passed to Slim\App::finalize() must implement interface Psr\Http\Message\ResponseInterface, null given, called in /var/www/site/vendor/slim/slim/Slim/App.php on line 316 and defined in /var/www/site/vendor/slim/slim/Slim/App.php:591 Stack trace: #0 /var/www/site/vendor/slim/slim/Slim/App.php(316): Slim\App->finalize(NULL) #1 /var/www/site/index.php(64): Slim\App->run() #2 {main} thrown in /var/www/site/vendor/slim/slim/Slim/App.php on line 591