A. 1. Check your internet connection: Ensure you have a stable internet connection, as a weak connection can prevent you from logging in. Try switching between Wi-Fi and mobile data. 2. Verify your login credentials: Double-check that you are entering the correct email and password. If you have forgotten your password, use the password reset option.

B. 3. Clear app data: Go to Settings > Apps > Subway > Storage > Clear Data. This will reset the app and may resolve login issues.