The M_ShapeMaster material included in the Engine content is missing two textures.

The material Engine/EditorShapes/Materials/M_ShapeMaster.M_ShapeMaster is missing two textures:

/Engine/EditorShapes/Textures/T_ShapeNormal.T_ShapeNormal
/Engine/EditorShapes/Textures/T_ShapeDiffuse.T_ShapeDiffuse

1. Create a new Blueprint First Person project.
2. Show engine contents in the Content Browser if it is not already enabled.
3. Navigate to /Engine/EditorShapes/Materials.
4. Double-click M_ShapeMaster to open it.

RESULTS:
Both Texture Sample nodes show errors because of missing textures.

EXPECTED:
The Texture Sample nodes properly show the textures being used.

Missing engine files (textures for M_ShapeMaster)