Slim Application Error

The application could not run because of the following error:

Details

Type: Invoker\Exception\NotCallableException
Message: App\Controllers\TagController::actionIndex() is not a callable.
File: /home/sergeivl/www/motivationals.ru/vendor/php-di/invoker/src/Exception/NotCallableException.php
Line: 33

Trace

#0 /home/sergeivl/www/motivationals.ru/vendor/php-di/invoker/src/CallableResolver.php(44): Invoker\Exception\NotCallableException::fromInvalidCallable()
#1 /home/sergeivl/www/motivationals.ru/vendor/php-di/slim-bridge/src/CallableResolver.php(27): Invoker\CallableResolver->resolve()
#2 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/CallableResolverAwareTrait.php(41): DI\Bridge\Slim\CallableResolver->resolve()
#3 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/Route.php(276): Slim\Routable->resolveCallable()
#4 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\Route->__invoke()
#5 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/Route.php(268): Slim\Route->callMiddlewareStack()
#6 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/App.php(503): Slim\Route->run()
#7 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->__invoke()
#8 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/App.php(392): Slim\App->callMiddlewareStack()
#9 /home/sergeivl/www/motivationals.ru/vendor/slim/slim/Slim/App.php(297): Slim\App->process()
#10 /home/sergeivl/www/motivationals.ru/public/index.php(7): Slim\App->run()
#11 {main}