I figured out now.

@junus_sefa9725, You are not alone. I can't figure out too.

I am a newbie, I hope the plugin owner ...

Oh man, you save my life. I am really appreciate. God bless you.

More information:

"require": {
     "php": ">=5.4",
     "october/rain": "~1.0",
     "october/syste...

Would you please check my default.htm?

There is something wrong. Honestly, I don't know where to put...

Thank for your reply. Now I put the component in nav.htm, nav.htm is partial.

[menu header_menu]
st...

I had a problem similar to @reynierpm, I attached menu component to layout. And I got nothing rende...