problem with addControllerRoute

[pioter]

I add new controller by:

addControllerRoute('hello', 'Index:index')->via('GET')->name('name'); and i have problem with

Invalid argument supplied for foreach()
Location:lib/vendor/slim/slim/Slim/Router.php in handleError , line 147

exactly is:

protected function processGroups()
    {
        $pattern = "";
        $middleware = array();
        foreach ($this->routeGroups => NULL

what i'm doing wrong?