quality standard required to move forward

Hi, how are you?
A few days ago I made 10 mockups and uploaded them to sell in evanto market. They rejected me with this message:
“Thank you for your submission. We have completed our review of” Frame Mockup - Bedroom "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 . "
I would like you to tell me what I am doing wrong, I need your opinions to improve.
Thank you.