My has been rejected. I need I need feeback.

I submit my item to codecanyon, and I received a mail from Evanto Quality team like this:
“…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.”

Actually, this is a almost first time I submit item to codecanyon. Can you give me some feedbacks.

My preview URL:
Admin demo: Log In ‹ Posify demo — WordPress
Plugin demo: Posify POS

The username and password, I put in login page of each demo.

Thank you