Need help! Why my product is rejected?

Hi, this is my first time upload product in concanyon. I wonder why my product is rejected?
Demo Link: http://anon-demo.jaironlanda.com/
Authentication:
Admin
email: jaironlanda@gmail.com
password: admin123

User
email: jaironlanda@outlook.com
password: user123

Please help me how to improve my product? This is because I’m using Bootstrap themes only? or my product is not enough functionality? I appreciate your feedback