Yeelight App detects WiFi network as 5GHz

The yeelight app does not allow me to connect to my router. The scanning process on the app works fine however once it asks me to select a router, my wifi network is greyed out with the text “5G Wifi networks aren’t supported.”
Firstly, my router is only capable of frequencies in the 2.4GHz range. I have tried changing them from channels 1-13 with no luck, even my phone recognises the wifi network as 2.4GHz. Is there any way to fix this?

SOLVED: My router was using WEP encryption which the yeelight app appears to be incompatible with. Using WPA2 stopped the issue

Yes, the lamp can only work with a router using WPA / WPA 2 encryption method with a password.