v6.4.0 tag doesn't belong to any branch on this repository

[Paride Legovini]

Hello, I maintain the Plex package in Debian (and Ubuntu and other downstream distros), and I normally package relying on git tags. I see that Plex 6.4.0 has been released, but the commit tagged as v6.4.0 (referenced in the GitHub "releases" page) doesn't belong to this repository:

Could you please verify and fix the tag, or point me to the repository to which the tag belongs?

Thanks!