My phone icon flashes after I press it and it will not connect to my phone. Tried rebooting. Software up to date. Suggestions, comments? Edit...It has worked perfectly for the last 18 months, until now.
I suspect that means it's trying to connect to your phone and can't. Check your phone to see if it's connected, but rebooting the phone and your watch could be all it takes to resolve. If not, maybe try re-pairing with your phone.