Plugin 'OculusVR' failed to load because module 'OculusEditor' could not be loaded.

I updated our Engine source to 4.23, and now we get this error when starting the Editor.  If I open the project with Visual Studio and compile everything, then I don't get the error.  But for users without Visual Studio, this is not a solution.  Anyone know what causes this?  It looks to me like the plugin is being rebuilt when we rebuild the engine and/or game.  The module engine association is the same as the engine's.  I don't get why this error is happening.