Failed to load Windows Mixed Reality Interop Library - UE 4.23

[scadl]

@ItsNotMeTrustMe

Had this same problem. I got it working again by copying a few lines from the 4.22 branch into 4.23. In ‘WindowsMixedRealityHMD.cpp’, you’ll see a comment “// Then finally try to load the WMR Interop Library” and the error message is right after that. Before that comment, around line 174, add this:

FString PerceptionSimulationDLLPath = EngineDir / "Binaries" / BinariesSubDir / "Microsoft.Perception.Simulation.dll";
FString HolographicStreamerDesktopDLLPath = EngineDir / "Binaries" / BinariesSubDir / "HolographicStreamerDesktop.dll";

void* PerceptionSimulationDLLHandle = FPlatformProcess::GetDllHandle(*PerceptionSimulationDLLPath);
void* HolographicStreamerDesktopDLLHandle = FPlatformProcess::GetDllHandle(*HolographicStreamerDesktopDLLPath);

And I CONFIRM that this solution really works for me! So **ItsNotMeTrustMe, **you saved my day, and not only one!
To everyone, who will use this, I strongly recommend to rebuilt MixedRealtityInterop plugin before repacking your game!