Why Rejected My 404 Page

I uploaded my first item to ThemeForest and it was rejected.
Can you help me to find the problems to be able to improve my future uploads?
link( https://nikxon.000webhostapp.com/ )

Do you actually have a license to use those images in a template to sell?

Other than that it is just too simple. Animations alone do not make a great template.

I am a graphic designer. I made it myself.