When trying to use Beamer in combination with tvOS 13, you may see an error dialog saying "Apple TV is not available for AirPlay." Playback controls in Beamer (pause, fast forward, etc.) may also be unresponsive.
Unfortunately, we haven't yet found a solution to this issue.
To continue to use Beamer with your Apple TV, it is possible in some situations to reinstall tvOS 12 on your Apple TV. This article on iMore has all the details.
Can’t find the answer you’re looking for? Contact Support