Plugin instalation error. "No plugins were found"

I get the following message as I try to upload the file (codecanyon-6109437-premium-seo-pack-wordpress-plugin.zip):

Unpacking the package…

Installing the plugin…

The package could not be installed. No valid plugins were found.

Plugin install failed.

 

That is not the plugin file. In this file codecanyon-6109437-premium-seo-pack-wordpress-plugin.zip you will find another .zip file with the plugin.