Slim Application Error

The application could not run because of the following error:

Details

Type: ErrorException
Code: 2
Message: Creating default object from empty value
File: /home/centum/public_html/centum.co.rs/app/controllers/Home.php
Line: 34

Trace

#0 /home/centum/public_html/centum.co.rs/app/controllers/Home.php(34): Slim\Slim::handleErrors(2, 'Creating defaul...', '/home/centum/pu...', 34, Array)
#1 [internal function]: Home->showCategory('de', '51')
#2 /home/centum/public_html/centum.co.rs/app/vendor/slim/slim/Slim/Route.php(454): call_user_func_array(Array, Array)
#3 /home/centum/public_html/centum.co.rs/app/vendor/slim/slim/Slim/Slim.php(1316): Slim\Route->dispatch()
#4 /home/centum/public_html/centum.co.rs/app/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#5 /home/centum/public_html/centum.co.rs/app/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#6 /home/centum/public_html/centum.co.rs/app/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#7 /home/centum/public_html/centum.co.rs/app/vendor/slim/slim/Slim/Slim.php(1263): Slim\Middleware\PrettyExceptions->call()
#8 /home/centum/public_html/centum.co.rs/index.php(103): Slim\Slim->run()
#9 {main}