Slim Application Error

The application could not run because of the following error:

Details

Type: Error
Message: Call to a member function getActiveSub() on null
File: /var/www/www.onsen.cz/src/routes.php
Line: 59

Trace

#0 [internal function]: Closure->{closure}()
#1 /var/www/www.onsen.cz/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(41): call_user_func()
#2 /var/www/www.onsen.cz/vendor/slim/slim/Slim/Route.php(344): Slim\Handlers\Strategies\RequestResponse->__invoke()
#3 /var/www/www.onsen.cz/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(122): Slim\Route->__invoke()
#4 /var/www/www.onsen.cz/vendor/slim/slim/Slim/Route.php(316): Slim\Route->callMiddlewareStack()
#5 /var/www/www.onsen.cz/vendor/slim/slim/Slim/App.php(476): Slim\Route->run()
#6 /var/www/www.onsen.cz/src/middleware.php(22): Slim\App->__invoke()
#7 [internal function]: Closure->{closure}()
#8 /var/www/www.onsen.cz/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array()
#9 [internal function]: Slim\DeferredCallable->__invoke()
#10 /var/www/www.onsen.cz/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(73): call_user_func()
#11 /var/www/www.onsen.cz/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(122): Slim\App->Slim\{closure}()
#12 /var/www/www.onsen.cz/vendor/slim/slim/Slim/App.php(370): Slim\App->callMiddlewareStack()
#13 /var/www/www.onsen.cz/vendor/slim/slim/Slim/App.php(295): Slim\App->process()
#14 /var/www/www.onsen.cz/public/index.php(25): Slim\App->run()
#15 {main}