TP-Link and WifiModem issue

[rsoussan68]

Thanks for reply, I don't have one of those Deco units. Mine is TP-Link AX6600 WiFi 6 Router and I did set up a guest network at 2.4GHZ and although it finds it in search it simply won't connect to it.
I can't whitelist because it needs IP address and the device has none until it connects.
Is there anything I have to do on TP-Link to allow access from this device?