Delete/Clear the software update data:
- Open Settings, and search for -> Apps.
- Touch 3 dot icons in the upper right corner, and enable Show system processes.
- In the search bar, search -> Software update
- Go to Storage > Clear data.
For versions earlier than EMUI 9.0, search for System update instead. Make sure that your phone is connected with a proper Internet connection, and go to Settings > System > Software update > Check for updates. Follow the on-screen instructions to download the update package again and then update your phone.
Check the latest EMUI Tips and Tricks Here.