This issue no longer occurs in 4.13
Users reported seeing the line "LogUObjectGlobals:Warning: Failed to find object 'Class None.'" in the Output log after creating a project. I was able to confirm in a new blank code project without starter content. This does not seem to affect creating, loading, or opening the project in anyway.
1. Open UE4 Editor
2. Create a new Code project w/o starter content
3. After project opens, close the project and open the project log file
4. Scroll to the bottom of the log to find the warning message
Head over to the existingAnswerHub thread and let us know what's up.