Can't upgrade Tubepress

In my Wordpress site I get the following error trying to upgrade Tubepress 5.1.3

Update Failed: Download failed. A valid URL was not provided.

Hi @fworley, thanks for reaching out! You can download the latest version of TubePress from our Downloads tab. You also have the option to enable automatic updates in WordPress by following this setup procedure. Please let us know if we can do anything else to assist!