4.12.3 Release from GitHub UE4Editor Can't Be Built

I’ve followed the instructions shown here:
https://github.com/EpicGames/UnrealEngine/tree/4.12.3-release

I am running Visual Studios Community 2015 (Update 3).

When building the entire solution, I get output.txt.
When building UE4 only, I get output_2.txt.

I’ve cleaned and rebuilt the solution and tried running the editor, but it can’t because of the errors.

Our team is currently running this version and not 4.12.4, so any help would be greatly appreciated. Thank you!

I was able to resolve this by following the instructions / answers here:

Thanks.