When a C++ project is named Test on a Binary version of the editor, the project will fail to compile. I'm assuming this is from the editor seeing a precompiled header from another file in the engine called Test.h.
This also occurs with projects named "Core"
Performing a non-hot reload build in Visual Studio will complete successfully.
Result: The initial compilation fails and shows the following message:
Expected: Either this should be possible or the Unreal Project Launcher should prevent the project from being named Test
Head over to the existingAnswerHub thread and let us know what's up.