Troubleshooting for the application update fails on the Mi Smart Projector, please refer to the following steps:
1. Ensure your projector is connected to the internet properly. Poor network connectivity can hinder app updates. You can verify the Wi-Fi connection settings in the projector's menu;
2. Sometimes, simple restart can resolve temporary glitches. Turn off the projector, wait for a few seconds, and then turn it back on;
3. Go to your projector's settings, find the Apps section, select the troublesome app, and clear its cache and data. Built-up cache or data might be blocking the update;
4. Make sure your projector has sufficient storage space available for the update. You can free up space by deleting unnecessary files or uninstalling unused apps;
5. Ensure that your projector's operating system is up to date. Check for any available software updates in the settings menu and install them if available. Software updates may include fixes that can resolve update issues;
6. If the automatic update fails, try manually updating the app from the app store. Open the app store, navigate to the app that failed to update, and select the option to update it manually;
7. If the issue persists, contact your local after-sales for further assistance regarding this issue.