Thanks for the report.
Just run ntlite.com /cleancu
Or start the tool and right-click C:\Windows, or Source - Tools, to Remove Returns.
it should clean it up.
If not, you can manually take ownership and delete this reg key:
HKLM\SOFTWARE\classes\clsid\{ede0c6e4-c5de-4377-a472-e590b23b604c}
and restart Explorer process or reboot.
(normal warnings about registry editing insert here)
I'm checking if it's possible to avoid it looking like that until cleaned, as it's ugly and promotes panic.
Or use Host Refresh to update, it's a cleaner way.
Running ntlite /cleancu should be done after CU update in 1903, each time, I might (optionally) automate that, still waiting for the CU-removed-piece-reinstall block instead.