A. Ensure that you are entering the correct username and password. If you have forgotten your password, use the 'Forgot Password' feature to reset it. Check your internet connection as well, as a weak connection can hinder the login process.
B. If you continue to experience login issues, try clearing the app's cache. Go to your device's settings, find the app under 'Apps', and select 'Clear Cache'. This can resolve temporary glitches.