Server build failing.

I’ve been battling the build tool for days, and finally found the source of my issue.

F:\UnrealEngine\UE_5.2_Source\UnrealEngine\Engine\Plugins\Online\OnlineSubsystemSteam\Source\Private\OnlineSubsystemSteam.cpp(44): error C2059: syntax error: ‘namespace’

I’m not sure why this is failing. I cloned origin/5.2 and ran the setup script. Have I missed a step?

Actual source of issue:
warning C4996: ‘GetBuildIdAsSteamKey’: UE4_PROJECT_STEAMGAMEDESC has been renamed to UE_PROJECT_STEAMGAMEDESC. Please update your code to the new API before upgrading to the next release, otherwise your project will no longer compile.

This is a lie. You must change these to UE_PROJECT*Whatever in your target.cs or it will not compile.