Error C3861: 'StartMatch': (identifier not found)

So I’ve been breaking my head to get around this problem.
Encountered the error while following the step by step procedure stated in the tutorial link below, couldn’t get past step #8 under ‘Creating a GameMode’ section. The error pops up every time I try to compile the code via both unreal editor or visual studio for that matter.
Tutorial link: A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums

Double check that your AFPSGameMode is inheriting from AGameMode and not AGameModeBase.