A. 1. Clear the app cache by going to Settings > Apps > Roland Piano App > Storage > Clear Cache. 2. Ensure your device has enough storage space available. Go to Settings > Storage and check available space. If low, delete unnecessary files or apps.

B. 1. Uninstall and reinstall the Roland Piano App to ensure you have the latest version and that all files are intact. 2. Check for any updates for your Android operating system and install them.