Yeelightstrip 1s disappears after connecting in the app

When I tried to connect my Yeelight 1S strip to the app, it will only show in the bluetooth part then afterwards, it will connect until 15-20% and ask me to rename and to turn on LAN. But then the Yeelight strip will appear in devices and then disappear after 2 seconds?

Been trying everything for the past week: resetting the device, resetting my router, removing and changing my wifi password, and using a data hotspot but it still wont connect

I need help :-((

Here’s a screen recording of the problem: https://drive.google.com/file/d/1RmPSlUeMCuAYDHNGRR1ZdtN5NnvugSlG/view?usp=sharing

Please provide your Xiaomi account and which server your device is connected to