To resolve the issue you are experiencing with the Benefits Pro app registration process not completing, follow these detailed steps:

1. Check Registration Information:
- Ensure that all personal information is entered correctly, including your Employee ID and any other required fields. Incorrect or unsupported information can lead to error messages like “Participant Not Found” which could halt your registration - learn more.

2. Update the App:
- Ensure that you are using the latest version of the Benefits Pro app. Open the Google Play Store, search for Benefits Pro, and tap on "Update" if it is available.

3. Clear Cache and Data:
- Go to your device settings and navigate to ‘Apps’ or ‘Application Manager’. Find Benefits Pro, tap on it, and look for options to clear the cache and then clear the data. This can remove any corrupted files that may be affecting the app's performance.

4. Check Internet Connection:
- Ensure that you have a stable and reliable internet connection, either via Wi-Fi or mobile data. A poor connection may disrupt the registration process.

5. Reinstall the App:
- If the problem persists, consider uninstalling the Benefits Pro app and then reinstalling it from the Google Play Store. This action may help eliminate any installation issues.

6. Contact Customer Support:
- If none of the above steps resolve the issue, reach out to customer service for assistance. You can contact them at 1-800-543-0874 during business hours for help with your registration problems - learn more.

Make sure to follow these steps carefully, and you should be able to complete the registration process successfully. If errors continue, documenting error messages or symptoms will help customer service diagnose the issue more effectively.