Hello CraigLangston,

Thank you for getting in touch with us. My name is Attila and I'm happy to assist you today. I appreciate your patience while we've been working towards your ticket.

The 'Update package not available' or similar error messages during the update process, are most likely symptoms of an interfering 3rd party theme or plugin.
We are constantly notifying and working together with various authors whenever we notice such issue. Unfortunately, these issues cannot be fixed from our end, and a temporary solution is updating manually or temporarily disabling other plugins and switching to the default WP theme and update that way.

Another possibility might be a stuck activation. If you've used our online tools to remotely deactivate a site (or asked us to do the same on your behalf) your site might no longer be activated. The same can be true if your purchase code has been revoked due to a refund or another reason.
In cases like this deactivating the license in the plugin (product activation box) and then immediately re-activating it can help.