Streaming From Phone - Larix Broadcaster

I am trying to stream from my phone to Cloudflare on Android. I found Larix Broadcaster app. It seems highly reviewed. I connect up to Cloudflare with it.

Cloudflare says connected but the stream just spins or doesn’t load. The resulting videos don’t seem to work either and are just black.

Any tips for debugging this?

Everything works fine from OBS on my computer.