How-I-fixed-it:
Press the Start key and type the word CMD, right click on the command prompt and select Run as administrator, enter the following commands one by one followed by the Enter key:
•- DISM.exe /Online /Cleanup-image /Scanhealth
•- DISM.exe /Online /Cleanup-image /Restorehealth
•- DISM.exe /online /cleanup-image /startcomponentcleanup
•- sfc /scannow
Reboot.
The answer is based on:
https://answers.microsoft.com/en-us/windows/forum/all/windows-10-search-app-icons-broken-only-white/14f57c34-9cac-4cb8-a133-0680da67aae4?tm=1560262812629
