Missing debug materials after building from source

Does anyone have any idea on how to get the debug materials added in on an editor configuration that has been built from source? I ask because they’re literally missing from the path that was suggested to check in a standard Google search was completely missing, resulting in the following crash report:

Fatal error: [File:G:\Dev\Epic Games\UnrealEngine\Engine\Source\Runtime\Engine\Private\UnrealEngine.cpp] [Line: 3046] 
Failed to load special material 'ClothPaintOpaqueMaterialName' from path '/Engine/EngineDebugMaterials/ClothOpaqueMaterial.ClothOpaqueMaterial'

Any advice on how to obtain or otherwise correct the files and references would be appreciated.