Every product show Style.css missing

Installing Theme from uploaded file: elements-cultivation-multipurpose-responsive-html-template-Y6JQHWK-YwAr2WsL-06-12.zip

Unpacking the package…

Installing the theme…

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

Theme installation failed.

HTML template and not a WordPress theme so it will not work on WordPress