I need help to get more details explaination why item had been rejected!

Hello Supporters/Staffs,
I’ve recently submitted my items to CodeCanyon Market, I can make sure scripts were written by me and assets from template I purchased with licensed and reusable. But my item still was rejected! I would like to understand how to modify and improve/adjust it to meet standard quality, in the email it had very less information and I don’t know what to do next. Here is details:

"Hi Tran Tuan,

Thank you for your submission. We have completed our review of “Amazon S3 Clould Storage Management v1.1.0” 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.

We appreciate the effort and time you’ve put into creating your item. And we’d be happy to help make sure your next entry will meet our submission requirements. Here’s our advice:

Visit our forums and ask fellow authors for feedback. Our helpful community will be glad to lend a hand.

Check out this Help Center article to understand why and how items get rejected.

Remember you can get help, in the form of tutorials or skilled professionals, on Envato Tuts+ and Envato Studio.

We hope to see a new submission from you soon!

All the best!

Envato Quality team

Still have questions? Contact our Help Center."

Thanks you, I am waiting for your feedbacks, and here is demo URL: