To resolve the issue of not being able to sign into the Healthy Benefits Plus app, follow these step-by-step instructions:

1. Check Your Membership Status: Ensure that you are a current member as only members can log in. If you are uncertain about your membership, you can verify it by contacting customer support. You can reach them at 1-833-832-7306 (TTY 711) - learn more.

2. Verify Your Credentials: Make sure the email address and password you are inputting are correct. If you have forgotten your password or username, click on the "Forgot Password?" link on the login page to begin the recovery process - learn more.

3. Update the App: Ensure that the Healthy Benefits Plus app is updated to the latest version. You can do this through the App Store on your iPhone. Updates often contain fixes for bugs that may affect the login process - learn more.

4. Check Internet Connectivity: Ensure that your device is connected to the internet. Sometimes login issues can arise due to poor connectivity. Try switching between Wi-Fi and cellular data to see if this resolves the issue.

5. Clear App Cache: If the app still won’t let you log in, try clearing the app’s cache. You can do this by uninstalling the app and then reinstalling it from the App Store, ensuring a fresh start - learn more.

6. Check for Server Outages: Sometimes, login issues can occur due to server outages. You can check the Healthy Benefits Plus website or their official customer service for any notices related to system downtime - learn more.

7. Contact Support: If you have tried all of the above steps and still cannot log in, directly contact customer support for assistance. They can provide specific help regarding your account or any known issues that may be affecting login - learn more.

By following these steps, you can troubleshoot and hopefully resolve the login issue you are experiencing with the Healthy Benefits Plus app.