A common issue that can occur when installing a WordPress theme is the “The package could not be installed. The theme is missing the style.css stylesheet.” error message being displayed when uploading the theme.
One of the reasons you may receive this error is if you have uploaded the incorrect file. Please upload the installable theme file (generally available in the downloaded folder with themename.zip file name).
Upload the Installable WordPress file admin area
- Log in to your WordPress admin area.
- Browse to Appearance > Themes.
- Click on ‘Add New’.
- Click ‘Upload’.
- Browse and select the theme zip file to ‘Upload’.
Upload Via FTP
- WordPress files can also be uploaded manually via FTP or File Manager.
- Upload the files to /wp-content/themes/ folder on your server.
- Login to your WordPress admin area to change the theme.