Its not that a folder is missing its the fact that unreal could not create the folder it needed
[File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\ShaderCompiler\ShaderCompiler.cpp] [Line: 3714] Failed to create directory for shader debug info ‘D:/Projects/Unreal Engine Projects/04 Undini Tutorial Series/Second Attempt/Detailed_Landscape 5.0/Saved/ShaderDebugInfo/PCD3D_SM5/M_Landscape_GodTier/FLandscapeXYOffsetVertexFactory/TBasePassPSFPrecomputedVolumetricLightmapLightingPolicySkylight/0’
Seems it need to create a folder for landscape shader debug information.
Have you tried cleaning your temp folders?
Maybe your lanscape got corrupted in a bad disk write?
Try deleting temp folders
- Intermediate
- DerivedDataCache
- Saved
Let the project rebuild its cache and see if the problem persists.