Kadence - Missing style.css stylesheet error

This error will occur if you upload the incorrect theme file onto your Themes page. After downloading your theme, here are your first three steps:

1. Unzip the file you downloaded (example: Savannah_WordPressTheme.zip).
2. Install the Kadence Theme from the WordPress themes directory on your Themes page.
3. Upload your 17th Avenue child theme file (example: savannah-theme.zip) on your Themes page.

Complete installation instructions for your theme can be found right here.

The child theme file will always be all lowercase and formatted similar to this:  savannah-theme.zip. It will not look like Savannah_WordPressTheme.zip or anything uppercase — that is the overall theme download folder.