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
Wireless scurity set
Force CCMP (AES).
reboot && exit
Save and Apply in