I'm in the middle of learning dDO and I'm stuck of color map baking from a high poly model to low poly.

I understand that I select the high poly, put it in source, and then low poly, to target. But everytime, I get this



The model is this



I've been trying and trying for a week and simply giving up and need help. This is the first time I created an account to get help.

I even modeled a simple high/low poly box and I get the same results. What am I doing wrong?