From the screenshot it looks like the app is failing to connect to the Zap Stream API. Zap Stream has been having troubles over the last few weeks, on and off intermittently which may cause the issue.

If ZS isn't working then you can alternatively use any other RTMP server. If you like to set one up easily, you can use API.video to get one, then press on the server in shosho to add the new server details to the app.

I will also take a look next time I am back at the keyboard.