Yet another 'Achievements not working' problem

Hello,

The problem is that achievements are not working. In the log files of the development build, there is this warning that appears when I try to execute the achievement related commands (it does not matter if blueprints of C++, I tried them both):

LogOnline:Warning: STEAM: Steam achievements have not been configured in .ini

But the DefaultEngine.ini contains the achievements, they are also on steamworks, and published.

[OnlineSubsystemSteam]
...
Achievement_2_Id="CRACKING_THE_SHELL"
Achievement_3_Id="I_AM_THE_WEAPON"

Can it be that I am making a stupid type error somewhere? Can it be possible that the .ini files get somehow stripped in the build?

Please help, I am at wit’s end.

For others who see this as first result check this thread:

The problem likely lies in the “…” part. Make sure you SteamAppID is set alongside all the default subsystem and net driver stuff.