Problem with Mondy Theme


I purchased Mondy theme a few days ago and tried installig it in Wordpress 6.2 today… I get

" Template is missing. Standalone themes need to have a templates/index.html or index.php template file. Child themes need to have a Template header in the style.css stylesheet.|"

when I try to install it through FTP and I get

The package could not be installed. The theme is missing the style.css stylesheet.

Theme installation failed." when i try to install through Wordrpess.

Help please.\

Hi there

Its not a WordPress theme, its HTML template