You have to find out the channel that in your country was setup with the router is working.
For me, I am Hungarian, but the router is FR based in FRANCE in EUROPE (or European Linksys is usually is FR), the
100, 120 channel is working well, I think upwards channels
But for now, it is using the
radar detection and it is changing the channels and it works.
iw reg get iw dev
Though I set 160Mhz, but my clients only know 80Mhz right now, but with the settings, it still works, so 160Mhz is working:
Wireless scurity set
Force CCMP (AES).
reboot && exit
Save and Apply in