Strmlnks not Playing

I’m using a Rasberry Pi 4 server and in the latest pre-release. The beta is installed on both iOS and tvOS. I’ve followed the instructions and the .strmlnk movies appear in the apps, but when I click “Watch” nothing happens.

I’m also behind a VPN, if that matters.

Any advice?

Do you have the other app installed? What link are you using?

Yes. I have the Channels DVR app installed and the Channels Beta app installed on both devices. So far I’ve just added Billy Madison (HBO Max) and Palmer (Apple TV), I have subscriptions to both and am signed into them in each device. I'm using the links from GitHub.