Headphones will not play sound

All my sound Runs through a Behringer Sound Card and Behringer Mixing Board but when I try to play my stream I cannot hear anything. What am I doing wrong?

Is your libretime instance set up with HTTPS ?
If so then its very likely that your stream is not and still set up as http. In that case the playback wont work. I have the same issue as i could not get the stream to be https (server was no problem) so I use a service from Autopo.st to create a secure stream so it works with our apps and alexa etc. But on a webpage like librtime you cant mix https and http so yes it will be silent. Hope that helps u understand ?