The keyboard works fine. It's just that momentary error window that quickly goes away during startup, probably just before it is recognized via bluetooth.
This is how it was shipped to me from Dell.
I would like to find in Windows 11 BIOS where in the Boot Settings Configuration for the Keyboard I can select for keyboard errors - "do not report" - to eliminate this alert window.
I've looked around in BIOS, feel like I am close, but haven't seen keyboard settings yet.