You may try generating a passcode to access your account instead. If you fail to access your account using the generated passcode, please re-activate your mobile device by following the instructions given in the User Guide.
To get Duo Push Notification working, please try the following :
1. If you have registered multiple devices, verify that you have selected the correct one at account verification screen. In addition, if you have set up automatic Duo Push, make sure that you are using the correct device to receive Duo Push.
2. Make sure the Internet connection from your mobile device is stable. For example,
a. Switch the mobile device to airplane mode and back to normal operating mode again
b. Turn off WiFi connection on your device and use cellular data connection
3. Check the time and date on your phone and make sure they are correct.
4. If you still cannot receive Duo Push Notification, please Re-activate your Mobile Device by following the instructions given in the User Guide.