I am also getting this issue on all the Solution Configurations including “DebugGame Editor” and “Development Editor” in the sln provided by the 4.9.2 download.
However I can get around this issue by switching my project to a source version (github) by: right click on the *.uproject file > Switch Unreal Engine version… > Choose the location where I keep the full source.
The reason I was using the downloaded version was so I can have a stable base for using the engine, instead of working on the engine. Also the git dependencies use tons of GB of my bandwidth and Comcast is reportedly putting up data caps now. And double that for using UE4 on my Mac and on my PC.
However we can’t use the downloaded version to do debugging with Visual Studio tools, for example, setting a breakpoint and stepping through the code, because of this issue. It is still possible to do printf debugging, and blueprint breakpoints with the binary download though, so maybe that’s why many people are not complaining about this.
It would be nice if someone smarter than me could solve this.