Offline. Changes won't appear on your other devices until 1Password reconnects

Hopefully you have solved this by now. I had the same alert on my iPhone after changing my master password on my laptop. Hitting 'Reconnect' did nothing. I fixed it by using 'Set up another device' in the desktop application. This can be found under Accounts (in top navigation bar) | Your account name | Set up another device. It may work in your case.