wifi doesn't support 5g

Last week my yeelight was working well at my flat, but i brought it to my parents for the weekend and back to me again and now it can’t connect to the network. It says my wifi doesn’t support 5g. I use it for a year now in different places never encountered a problem like this before. Can somebody help me out. Thanks

Not 5G probably 5Ghz. Make sure your 2.4Ghz and 5Ghz Wifi SSIDs are different.