Yellight Bulb Color 2 not connecting

My Yeelight bulb color 2 was working fine until I changed my router/WIFI name & password.
Now after resetting the bulb I am trying to reconnect the bulb with same WIFI but count not connection.

When I am pressing NEXT butting after selecting my network my WIFI is getting off & automatically connecting ON.

But meanwhile it is showing CONNECTIN TIME OUT error.
Please help

When connecting to wifi. Please re-enter your password in Yeelight app. Because the password is cached.