Error Code 0x80073CF6 is seen after updating and restarting your Xbox or after updating a windows app. This error code has also been seen with Spotify as well. It has also been reported with Call of Duty: Warzone and the Microsoft Flight Simulator. It has even been reported with installing Visual Studio.
Using a clean boot option in Windows is one suggestion. Others have reset Windows to regain functionality.
Microsoft is still investigating this error.
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Efforts to debug this error have not yet been successful. It may be related to corruption in the registry that Windows cannot correct.