If you own a 2nd generation Automatic adapter, please see this FAQ regarding setup.
If you are setting up Automatic for the first time, be sure to select "Get Started" in the app and not "Login". If you already have an account, you should select "Login". Read each screen and follow the steps carefully. Also make sure that you have a strong cellular connection, and if you are on the border of a WiFi network, try turning off WiFi on your phone temporarily.
Please do not plug in the adapter before starting Setup. Setup will tell you when it's time to plug it in.