Working issue

Mi smart is connecting to my device (also blink when connection process) but when connection process is completed it will not accept yeelight commands or option to colour changing

But when I connect with my mobile hotspot it’s working properly

Please tell me I’m what are requirements or changes required in my wifi network settings
(It is connecting with my wifi , it is shown in the list)

Make sure your WiFi works on the 2.4GHz band