SOCO can't understand my URI. UPnP Error 714 received: Illegal MIME-Type. Can I convert it into something understandable for SOCO?

Question

I use SOCO (deals with Sonos API) and I want to play this url, but I can\'t because it says soco.exceptions.SoCoUPnPException: UPnP Error 714 received: Illegal MIME-Type from IN