Cant Connect mi bedside lamp 2 to app

Hey there
I have a mi bedside lamp 2 for about a year or so and suddenly it disconnected from my Yeelight app.
now I cant connect it anymore .
I can see the lamp in the scanned devices and connect to it but after few seconds around 65%
its says : check network and try again
in my router settings I can see the lamp I have 2.4Gh and 5Gh wifi with password wpa-wpa2 secure
i have tried those settings

  • 2.4GHz + 5GHz
  • 2.4GHz only
  • 5 GHz only
  • no security
  • WPA2-PSK