Slim Application Error

The application could not run because of the following error:

Details

Type: TypeError

Code: 0

Message: Slim\Handlers\Strategies\RequestResponse::__invoke(): Return value must be of type Psr\Http\Message\ResponseInterface, null returned

File: /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php

Line: 43

Trace

#0 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/Routing/Route.php(384): Slim\Handlers\Strategies\RequestResponse->__invoke()
#1 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): Slim\Routing\Route->handle()
#2 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): Slim\MiddlewareDispatcher->handle()
#3 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/Routing/Route.php(341): Slim\MiddlewareDispatcher->handle()
#4 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/Routing/RouteRunner.php(84): Slim\Routing\Route->run()
#5 /usr/www/users/azvebk/azv/vendor/tuupola/slim-basic-auth/src/HttpBasicAuthentication.php(126): Slim\Routing\RouteRunner->handle()
#6 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(147): Tuupola\Middleware\HttpBasicAuthentication->process()
#7 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/Middleware/ErrorMiddleware.php(107): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#8 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(147): Slim\Middleware\ErrorMiddleware->process()
#9 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/Middleware/BodyParsingMiddleware.php(68): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#10 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(147): Slim\Middleware\BodyParsingMiddleware->process()
#11 /usr/www/users/azvebk/azv/vendor/slim/twig-view/src/TwigMiddleware.php(115): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#12 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(147): Slim\Views\TwigMiddleware->process()
#13 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/MiddlewareDispatcher.php(81): Psr\Http\Server\RequestHandlerInterface@anonymous->handle()
#14 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/App.php(215): Slim\MiddlewareDispatcher->handle()
#15 /usr/www/users/azvebk/azv/vendor/slim/slim/Slim/App.php(199): Slim\App->handle()
#16 /usr/www/users/azvebk/azv/public/index.php(194): Slim\App->run()
#17 {main}