Why is Yii2:simple chat not working?

Question

Yii

I'm trying to install SimpleChat Extension.
Put everything, tables were created.
I added model and controller files, and when I try to go to the message page, I get a redirect to a 404 error.
Everything works without errors, as far as I can tell.
I have added in MessageController

public function actionIndex()
{
echo 1;
}

and expectedly got a white screen with a single instead of a 404 redirect.

Answer 1

If this extension is
https://github.com/bubasuma/yii2-simplechat
then use the route
https://github.com/bubasuma/yii2-simplechat/blob/m...
your.site/message S