I get this error every time I start the UE5 editor. I have baked a scene with the M_ProcGrid material so the bUsedWithStaticLighting becomes available, ticked the box so it is on and saved the material. I still get this error every time on startup even though bUsedWithStaticLighting is true on M_ProcGrid.
“M_ProcGrid Material /Engine/OpenWorldTemplate/LandscapeMaterial/M_ProcGrid.M_ProcGrid was missing the usage flag bUsedWithStaticLighting. If the material asset is not re-saved, it may not render correctly when run outside the editor. Fix but I have opened M_ProvGrid and ticked Used with Static Lighting variable to true”