TP-Link EAP615 (Wifi 6) and 2 sonoff devices

Hi All

I have been trying without success to get 2 sonoff devices to join the wifi network.

SONOFF TX T3 WiFi Smart
and
SONOFF SMART LED CONTROLLER - L2-C

They pair and work fine if I use a old wifi extender that connects to the 2.4 network i have created for IOT devices.

Do any of you have any ideas how to get these devices to work directly with my Wifi 6 Access Points ?

My other post was posted on the tp-link forums

I think you need a password put in.

I would use the Guest network for a sperate 2.4g SSID for the IOT devices.
Make sure you can connect with your telephone to the SSID first.

ok, let me enable the guest checkbox

That did not help.