403 means forbidden. same error using a standard browser. you may have to start over to track down the playlist. many possible explanations. go back to the beginning. obviously, the station doesn't want people using the stream without going through the station's webpage. they found somebody to take care of that (wowza - wowza is a streaming service. your station is now paying wowza to stream stuff for it.) good luck!
'ListaSources is the list with URL's
'mp1 is SimpleExoPlayer
Dim url As String = "https://evpp.mm.uol.com.br/band/radiobandeirantes_sp/playlist.m3u8"
If url.Contains("m3u8") Then
ListaSources.Add(mp1.CreateHLSSource(url))
Else
ListaSources.Add(mp1.CreateUriSource(url))
End If
mp1.Prepare(mp1.CreateListSource(ListaSources))
mp1.Play