Hey Guys i submit a template why it is rejected

The template that I submit is rejected with this point:

Thank you for your submission. We have completed our review 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.

We hope to see a new submission from you soon!

Why they rejected whats the problem?

https://hpdemo.demo/index.html

Your demo link is broken

Sorry, it is fixed I didn’t post the link correctly in this post.

Could you please tell me why they hard rejected? what skills should i need to improve

I think they will expecting more unique & aesthetic design.
Take a look on newest approved item on your category hope you will understand.
Try to more study & research and create Aesthetic hope will approved.