2 items rejected - help

Hello guys it’s my first time here on Graphic River and I’ve got my items rejected.
I cannot figure out the reason. Could you help me?

Both are .ai files and well-organized layers to be easy to customize.
The message on the email is:

Thank you for your submission. We have completed our review of “Car Fiat 500 - Vehicle Vector” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.