When I try to install VersionPress, it tells me, “The package could not be installed. No valid plugins were found.”

I’m trying VersionPress for the first time. I downloaded the project from the VersionPress GitHub page, then went to Plugins>Add New in my dashboard and uploaded the zip file “versionpress-master.zip” and click the install button. Then, when the project starts loading, it takes me to a screen that reads:

Installing Plugin from uploaded file: versionpress-master.zip
Unpacking the package…

Installing the plugin…

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

Plugin installation failed.

Am I doing something wrong? I’m doing this on the version of my site that lives on my shared server, not on my local installation.