How do I get my groups to work? I have 5 bulbs/plugs in the Living Room. I have put them into a group marked "Living Room" but when I ask Alexa to turn living room on, Alexa says "Living Room doesn't

A few days ago I changed out my internet router which means a new password which means I have to reset all my bulbs (20!). I have successfully reset all of them but I can't seem to put them in groups.