A. 1. Check your credentials: Ensure that you are entering the correct username and password. If you have forgotten your password, use the 'Forgot Password' option to reset it. 2. Check internet connection: Ensure you have a stable internet connection, as poor connectivity can prevent successful logins.

B. 3. Clear app cache and data: Go to Settings > Apps > Sandals & Beaches Resorts > Storage > Clear Cache and Clear Data. This can resolve issues related to corrupted data.