Problems with my Yeelight Bulb v2

So i was trying to connect my yeelight bulb since i had to change my router name and password so i reset the bulb and try to reconnect it when i was reconnecting it to the network it fails when it hit 100% it keep saying “Connection timeout” even though i am connected to the network so i try again and it still keep saying “connection timeout” can someone help me with this idk what to do

1、Make sure if the bulb connects to your router.
2、If yes, try change DNS of your router to and connec again.