Cant load an audio file with "+" in its local path

Hi im using UnityWebRequest to load a local audio file from my hard.

string path = "C:\Songs\my_music 3.0+1.01/music.mp3";

using (UnityWebRequest wwww = UnityWebRequestMultimedia.GetAudioClip("file:///" + path, AudioType.MPEG))
                {
                    var synRes = wwww.SendWebRequest();
                    yield return synRes;

                    if (wwww.result == UnityWebRequest.Result.ConnectionError)
                    {
                        Debug.Log(wwww.error);
                    }
                    else
                    {
                        Musica.clip = DownloadHandlerAudioClip.GetContent(wwww);
                    }
                }

give me this error:

InvalidOperationException: HTTP/1.1 404 Not Found
UnityEngine.Networking.DownloadHandler.GetCheckedDownloader[T] (UnityEngine.Networking.UnityWebRequest www) (at :0)
UnityEngine.Networking.DownloadHandlerAudioClip.GetContent (UnityEngine.Networking.UnityWebRequest www) (at <2cf75a7170104cfeb19f62c159dcd056>:0)

If i remove manually “+” in the path its work fine.
I tried with UnityWebRequest.UnEscapeURL but just deletes “+” and give me the same error.

Hi. Mikkel here from Unity. Which version are you using and is it on a windows machine?. Your path looks a little bit strange with \ and / in the same path?