Not able to stream radio

[Pcdejong]

When I try to stream a radio url (tunein) to my heos bar it doesn't work. Everything else like pause, play, stream spotify works fine. I get this error in my log:

Error executing service <ServiceCall media_player.play_media: media_content_id=http://playerservices.streamtheworld.com/api/livestream-redirect/RADIO538.mp3?tdtok=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiIsImtpZCI6ImZTeXA4In0.eyJpc3MiOiJ0aXNydiIsInN1YiI6IjIyMTgxNzA0MyIsImlhdCI6MTUyOTE4NjM4NywidGQtcmVnIjpmYWxzZX0.Giics7_t_RBXoyvMV98kCb7Qj6k, media_content_type=music, entity_id=['media_player.heos']>
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/homeassistant/core.py", line 1007, in _event_to_service_call
await service_handler.func(service_call)
File "/usr/lib/python3.6/asyncio/coroutines.py", line 128, in throw
return self.gen.throw(type, value, traceback)
File "/usr/lib/python3.6/site-packages/homeassistant/components/media_player/init.py", line 415, in async_service_handler
await getattr(player, method['method'])(**params)
File "/usr/lib/python3.6/concurrent/futures/thread.py", line 56, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/lib/python3.6/site-packages/homeassistant/components/media_player/init.py", line 705, in play_media
raise NotImplementedError()
NotImplementedError

Any idea?