Why can't I compile code in the editor when it will compile in VS?

[anonymous_user_a0d22a251 (anonymous_user_a0d22a25)]

I try to compile code like in this video: Introduction to Programming | Live Training | Unreal Engine - YouTube
When I compile code in Visual Studio 2013 Professional it works. But when I click “Recompile Game Code” in the editor I get these errors:

I didn’t add new headers, classes, etc. I’m doing like in the video. I’m just changing “.Roll” to “.Yaw”.
How can I fix it? It will be too slow if I close the editor every time when I want to apply minor changes