I was having quite a bit of trouble finding the file mentioned in this video while using Unreal 4.23.1 / Visual Studio 2019, so I thought I’d make a quick post to help out anyone else having the same issue.
You can find the file directly at this path:
…\UE_4.23\Engine\Binaries\Win64
In my case it was this:
C:\Program Files\Epic Games\UE_4.23\Engine\Binaries\Win64
If you open the file in any text editor, add the space, and save it, it will work like shown in the video.