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.

EDIT: I found the location of the materials; the relevant folder directory ended up being located in “UE5Path)/Engine/Content" instead of just "(UE5Path)/Engine” for some unknown reason. I would assume that a bug report is in order.

EDIT 2: After further consideration, I just remembered that “Content” is the root of project files in Unreal, so ignore the above as it also likely applies to the editor. I’m probably going to have to go about this from an entirely different angle than expected.

Final update: I’ve run out of ideas. Unfortunately, the only way out of this is to literally start over and rebuild the whole ■■■■ thing again.