Warning: Undefined array key 0 in /opt/dbis-projekt/dbis_server/src/Action/Frontend/Users/UsersResultsPage.php on line 97

Warning: Undefined array key 0 in /opt/dbis-projekt/dbis_server/src/Action/Frontend/Users/UsersResultsPage.php on line 137

Fatal error: Uncaught TypeError: strlen(): Argument #1 ($string) must be of type string, null given in /opt/dbis-projekt/dbis_server/src/Action/Frontend/Users/UsersResultsPage.php:137 Stack trace: #0 /opt/dbis-projekt/dbis_server/src/Action/Frontend/Users/UsersResultsPage.php(137): strlen() #1 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(38): App\Action\Frontend\Users\UsersResultsPage->__invoke() #2 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Routing/Route.php(358): Slim\Handlers\Strategies\RequestResponse->__invoke() #3 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(65): Slim\Routing\Route->handle() #4 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(65): Slim\MiddlewareDispatcher->handle() #5 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Routing/Route.php(315): Slim\MiddlewareDispatcher->handle() #6 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Routing/RouteRunner.php(68): Slim\Routing\Route->run() #7 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Middleware/BodyParsingMiddleware.php(64): Slim\Routing\RouteRunner->handle() #8 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(121): Slim\Middleware\BodyParsingMiddleware->process() #9 /opt/dbis-projekt/dbis_server/vendor/slim/twig-view/src/TwigMiddleware.php(115): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #10 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(121): Slim\Views\TwigMiddleware->process() #11 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Middleware/RoutingMiddleware.php(45): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #12 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(121): Slim\Middleware\RoutingMiddleware->process() #13 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/Middleware/MethodOverrideMiddleware.php(41): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #14 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(121): Slim\Middleware\MethodOverrideMiddleware->process() #15 /opt/dbis-projekt/dbis_server/vendor/selective/basepath/src/BasePathMiddleware.php(52): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #16 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(121): Selective\BasePath\BasePathMiddleware->process() #17 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/MiddlewareDispatcher.php(65): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #18 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/App.php(199): Slim\MiddlewareDispatcher->handle() #19 /opt/dbis-projekt/dbis_server/vendor/slim/slim/Slim/App.php(183): Slim\App->handle() #20 /opt/dbis-projekt/dbis_server/public/index.php(45): Slim\App->run() #21 {main} thrown in /opt/dbis-projekt/dbis_server/src/Action/Frontend/Users/UsersResultsPage.php on line 137