Cannot open source file "coreminimal.h" after installing Steam SDK

Hello there!

I am enabling online multiplayer in my game and stumbled into following problem:

After I added Steam SDK to my stock Unreal Engine 5 my IDE (both Visual Studio, Rider) started giving me these errors:

Any file in the Unreal Engine source produces these kind of errors:

Cannot open source file “coreminimal.h” etc.

Compiling works fine - I can start the editor and run my game. So, it’s not fatal error - it just makes coding harder. ‘Quality of life’ issue.

I guess it happens because I modified the source code of the stock unreal engine but I am not sure. If I reinstall Unreal Engine the problem goes away. But again I need to add steam sdk to the engine.

1 Like

I have the same problem.