ERROR Could not find vertex colors in mesh

[We Must Greg]

Hello everyone
i was trying to bake normal map from a high poly mesh to low poly earlier this morning. However this error pops up everytime i tries baking and the normal map is always pale blue after baking.
The Log shows something like this :
...
[Baking] Could not find vertex colors in mesh Upper_Body.001_Plane.003
[Baking] Could not find vertex colors in mesh Upper_Body.001_Plane.003
[Baking] Not enough data in the high poly to use selected baker. Baking has been canceled.

Log image : https://imgur.com/a/tVvglo8

My model is from blender and i dont think theres something called vertex color in the program. Also i dont remember theres a mesh called Upper_Body.001_Plane.003 in my model file. I have been looking for this name for hours but still clueless.
I have read other discussion already and i already assigned materials to both my high and low poly mesh and also UV unwrapped them both, Normals are also facing outside.
Please help i am so damn confused now.

[MacBernick]

You probably need to set the "Color Source" to "Material Color" for the ID map in the Baking popup.