N300 can't find my 5G network

Hardware Version: WN3000RPv3

Firmware Version: V1.0.2.24

Howdy,

My WiFi extender is only seeing 2G networks (including mine) when I go through a fresh setup via http://www.mywifiext.com/.

But I'm trying to connect to my 5G network, like I do with several other devices.  The setup process doesn't show any 5G networks.

My router is broadcasting the 5G network name and has these settings:

Mode:  802.11 n/ac

Transmit Power:  100%

Channel Selection:  Automatic

Channel:  n/a

Channel Bandwidth:  20/40/80(auto)

Is this extender not 5G compatible?  Any suggestions?

Thank you in advance!