LumenProbeHierarchy.ush pragma warning: project doesn't compile out of a sudden

I got the following errors out of the blue:

  LumenProbeHierarchy.ush(8): [C4616] #pragma warning: warning number '3206' not a valid compiler warning
  Common.ush(9): [C1083] Cannot open include file: '/Engine/Public/Platform.ush': No such file or directory
  Microsoft.MakeFile.targets(44, 5): [MSB3073] The command "F:\ue\UE_5.0\Engine\Build\BatchFiles\Build.bat MurderInSpaceEditor Win64 Development -Project="F:\ue\projects\MurderInSpace\MurderInSpace.uproject" -WaitMutex -FromMsBuild" exited with code 6.

I don’t know anything about the files LumenProbeHierarchy.ush and Common.ush (or Platform.ush). I don’t even know where they reside.

The breakage is completely unexpected as I wasn’t messing with engine versions or anything. There was a weird error connected with this, though: At some point, before startup the Unreal Editor told me “This project was build with a different engine version”. (Not true, I only have 5.0.3 installed)

I should have known:

#include “…/…/…/…/…/UE_5.0/Engine/Shaders/Private/Lumen/ProbeHierarchy/LumenProbeHierarchy.ush”

Rider included this when I hit ALT + Enter at some point … Second time this happens.