Reason for this error?

I’m using Niagara to make a very simple particle effect, spawning a bunch of particles inside a mesh. I’m getting random crashes, and this message : Static Mesh data interface is cannot run as it’s reading color data on a mesh that does not provide it. - Mesh:StaticMesh /Game/Models/Geometry/Meshes/1M_Cube_Chamfer.1M_Cube_Chamfer .

How do I sort this out ?

reading color data? I would assume that this particular editor mesh has no vertex paint?
Use your own custom cube? They usually import with vertex paint of 255 across RGBA unless your file specifies differently (or I suppose that’s a blender thing that they come in as full white).