I have already installed and activated the wordpress-pkg_gantry5_v5.4.37.zip framework plugin.
I downloaded the Milano template, went to a WordPress site, went to Appearance > Themes, click Add New, selected the downloaded template file but got this error message:
Installing theme from uploaded file: tpl_it_milano-1.11.0.zip
Unpacking the package…
Installing the theme…
The package could not be installed. The theme is missing the style.css stylesheet.
Theme installation failed.
How can I install this template on a WordPress site?