Something is not right in this picture. If you are showing three colors - the third middle one - Green and Red do not make a light blue. If you are just making circles with an intersecting color at least make the margins of the smaller center section inside or matching outline with the other circles. Otherwise, it just hangs wanting to belong someplace it should. So, look at this in 100 - 200 % enlargement and study all of it - every inch. Look for errors in composition and clarity of all things even the background. Buyers want to be able to change a background. Anyone can make these circles and intersecting center ellipsis. The background is the best part for professional color and lighting. Green and red do not a blue make. Not sure there is much of a demand for this but give it a try, sharpen it up and resend it. Best regards, JH
May be "technical error" was an error of the moderator. "Commercial appeal" would have been a better reason.
I agree with Joan - red and green don't make light blue, but rather a brown colour. Also, shouldn't the light blue be within the intersecting circle? As it is, it is just 'hanging' as Joan said. (Unless this is intentional, and if it is, I don't think it works.) The overall colours may be a bit off as well and I think this is due to the brown background. It is not a good choice of colour. I think this is what the moderator is referring to in 'technical issues/error'.
I agree with your an Joan's analysis, but not with the refusal reason that was given. You can do anything in an illustration, even things that are not logical or possible, and that is not a technical error. But it will probably be unsellable...