Windows Update History reports that KB4054517 failed to install because of error 0x80070643.
Even though the update was successfully installed, Windows Update incorrectly reports that the update failed to install. Select Check for Updates to confirm that there are no additional updates available.
You can also type About your PC in the search box on the taskbar to confirm that your device is using the expected OS build.
Microsoft is working on a resolution and will provide an update in an upcoming release.