Ajax Not Reloading

Hello, I am trying to use ajax, it makes the call but not refresh/reload the div with the result, here are screenshots of my code:

Is a form with class "cm-ajax" , I tried to add "cm-ajax-full-render" but it doesnt work either, it has a hidden input with id of the div to reload, which is down

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aqui tiene que haber cosas{$externCategories}

And this is the controller, where i get the call and response

if($mode == 'add_stor'){  
Tygh::$app['view']->assign('externCategories', "DATA");



Why is not refreshing the div? Can you help me