Cant pair iphone or android with yeelight ceiling

Tried several times to connect my iphone or android device with the ceiling light. Every time I got an connection error message. Even with a mobile hotspot connection I cant pair it. Please help…

After the failure, could you check whether you could see the ceiling device on your router? Also you could provide your xiaomi ID and the server you are connecting.

Yes, I can see the device on my router. My ID is 1772066075 and i am using the german server.

Any updates?