What is better for the theme?

What are your intentions for your website?

I want to look good
Something like theme
The theme does not work when installed on site

The theme does not work when installed on site

Have you raised a support thread to discuss that?

All you need to make a theme look good is CSS, so you need a “style.css” file – which is required anyway. Then just make your templates in PHP.

The theme does not work when installed on site
The theme is installed otherwise
Or be modified

If you need support for the Vantage theme create a thread here: https://www.ads-software.com/support/theme/vantage#postform