I recently got a Slingbox m2 and while it's not perfect, it has been very good! I'm just going to list out the facts of what's going on and hopefully someone here can help me out:
1. I can cast from Slingplayer on my iPad to chromecast when I am home
2. I cannot cast from Slingplayer on my iPad to chromecast when I am at my apartment
3. Slingbox is connected at home and connected via wifi.
4. When I'm at my apartment, I get the error "Unable to stream(10)"
Can anyone help me with this issue? I can answer any further questions you have. It's been very frustrating not being able to cast it to my TV when I'm at my apartment.
You might have to setup a port forwarding rule on your router where your Slingbox is located (your home, not apartment). Do a Google search for "Unable to stream(10)" https://www.google.com/search?q=Unable+to+stream(10)&oq=Unable+to+stream(10)&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8
and you will find many articles that will help with this issue.