Why my codeigniter script is rejected ?

I am new in codecanyon, I upload a php script in codecanyon and the reviewer rejected this. I cannot understand why my script rejected every time? They are only said -

‘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.’

Demo Link : http://crud.exaltedsolution.com/
Login credential :
Email : admin@admin.com
Password : admin