Mi Bedside lamp 2 can't connect

Hey, I purchased Mi Bedside lamp 2 about 2 months ago and forgot to connect it.
I have been trying to connect it for a few days and it seems not to work.
The error is when I try to connect it’s trying to connect to the wi-fi but after a few seconds, its says connection time out.
I am sure that I am connected via my phone to a 2.4 wifi network.

Things that I have tried:
changing wifi password and name
Hotspot with 2 different phons
using both yeelight app and mi home app

also, I cant see the lamp connected in my router settings Home Network View

Thanks for the help.

maybe there is something wrong with the device.
we suggest to exchange goods.

Hi, at mine bedside lamp 2 tell me that it is connected without Internet.
It can’ t be seen on application Mi home on Android phone.
Please help