FreshTomato 2019.3.220-beta - No 5GHz wireless interface for AC66U

Hello,

Today I decided to upgrade from Tomato Shibby (tomato-RT-AC66U_RT-AC6x--140-AIO-64K) to FreshTomato (freshtomato-RT-AC66U_RT-AC6x-2019.3.220-beta-AIO-64K) on my Asus RT-AC66U, but no 5Ghz interface is available on the Overview or Basic -> Network.

To begin with I started by upgrading to freshtomato-RT-AC66U_RT-AC6x-2019.2-AIO-64K.
Upgrade process went smooth, and I did erase the NVRAM after completing the upgrade.
I then went on to the configuring process, such as changing the...

FreshTomato 2019.3.220-beta - No 5GHz wireless interface for AC66U