The reasons why the app can't be updated may be: Insufficient memory remaining on the phone, network problems, and some unknown reasons for the software. It is recommended that you do the following troubleshooting:
1. Clean up the phone memory.
If the phone has insufficient storage capacity, it may cause the app to fail to update. You can delete some unnecessary files and try again.
2. To ensure that the network environment is normal.
You can change your mobile network or switch Wi-Fi to try again.
3. Uninstall and reinstall the app.
You can uninstall the app and download the latest version of the app through official channels.
If the above does not solve your problem, please go to the nearby realme service center for testing.