Fatal crash: Loading project, "Failed to load special material"

I cant find the preview material thingy in there it is just alot of non sense for me typed words and it is just not there

i simply cant see this massage in the DefaultEngine.ini ( ```
PreviewShadowsIndicatorMaterialName=/Engine/EditorMaterials/PreviewShadowIndicatorMaterial.PreviewShadowIndicatorMaterial
PreviewShadowsIndicatorMaterialName=None