What's the issue with Shapely?

Hello. I have purchased Shapely but when upload it on my website, It shows following messages;
Unpacking the package…

Installing the theme…

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

Theme installation failed.

What is the best possible solution? Currently I am using GeneratePress Theme.

Hi there

Shapely is a free WordPress theme that is listed in the wordpress.org repository, you can install it from the WordPress menu > Appearance > Themes, search for shapely and and install directly, no upload is necessary in this case