I've made several attempts to install the Windows 10 Update: 2018-04 Cumulative Update for Windows 10 Version 1709 for x64-based Systems (KB4093105).
The Update History says:
Last failed install attempt on 25/04/2018 - 0x800f0845
I've run the following, neither reports errors:
DISM.exe/Online /Cleanup-image /Restorehealth