A. 1. Verify Credentials: Double-check your username and password for any typos. If you have forgotten your password, use the 'Forgot Password' feature to reset it. 2. Clear App Cache: Offload the app from iPhone Storage to clear any corrupted data that may be causing login issues.

B. 3. Reinstall the App: Delete the app and reinstall it from the App Store to ensure you have a fresh version.