Baking to Vertex Colors would always bake to sculpt vertex colors (if such a layer is present) even if those are not enabled in the experimental preferences. This would bake without an error but leave the user without a result to look in the viewport. Now check if sculpt vertex colors are enabled and only bake to them in that case. Maniphest Tasks: T86455 Differential Revision: https://developer.blender.org/D10692