Mi led desklamp no access point

My mi led desk lamp just won’t connect to my phone. I’ve used Mi home app, Yeelight app and none can detect my lamp, manually detect won’t work too cause there is no access point by the lamp. I’m very frustrated, my smart lamp turned into not-so-smart lamp :frowning:

Can somebody help me please…

Was the lamp working before?
Have you installed a firmware update before? I updated the lamp and it stopped working and create hotspot on reset.