[Router] Cant't use tunnel to access my NAS [QNAP]

Hi all,

I have set up a tunnel to connect my home network. And the tunnel set up in my synology NAS which is works fine. I can access my printer, my router, and all of my local device.
So I think I have set it up correctly.
However, I just cant access my NAS. I have no idea if the router is related or not. Is there any people have clue with it?

Model of the Router: QNAP QHora-301W