I downloaded a theme (Architeca – Just another Template Kits by Jegtheme site) and I extracted the file. There are four types of files: manifest.json, help.html, templates (folder), and screenshots (folder).
First, I tried to upload all of the zip folders. Then, I unzipped the files and zipped the four folders above. After that, I attempted to zip and upload the template folder. I received the following error message on all three attempts. Please review the attached files for your reference
Installing theme from uploaded file: help.zip
Unpacking the package…
Installing the theme…
The package could not be installed. The theme is missing the style.css stylesheet.
Theme installation failed.
Please, somebody help me out of it.