What it can be?
Opening track for playback: "song.mp3"
[UPnP] Device protocol info:
[UPnP] http-get:*:audio/mp3:*,http-get:*:audio/x-mp3:*,http-get:*:audio/mpeg:*,http-get:*:audio/mpeg3:*,http-get:*:audio/x-ms-wma:*,http-get:*:audio/wma:*,http-get:*:audio/wav:*,http-get:*:audio/x-wav:*,http-get:*:audio/ogg:*,http-get:*:audio/x-ogg:*,http-get:*:application/octet-stream:*,http-get:*:audio/flac:*,http-get:*:audio/x-flac:*,http-get:*:audio/musepack:*,http-get:*:audio/x-musepack:*,http-get:*:audio/wavpack:*,http-get:*:audio/x-wavpack:*,http-get:*:audio/ape:*,http-get:*:audio/x-ape:*,http-get:*:audio/mp4:*,http-get:*:audio/m4a:*,http-get:*:audio/x-alac:*,http-get:*:audio/3gpp:*,http-get:*:audio/aiff:*,http-get:*:audio/x-aiff:*,http-get:*:audio/aif:*,http-get:*:audio/x-aif:*,http-get:*:audio/x-caf:*,http-get:*:audio/dsf:*,http-get:*:audio/dff:*,http-get:*:audio/basic:*
[UPnP] Listening on: 192.168.88.10:58591
[UPnP] Stream address: http://192.168.88.10:52550/4/stream.wav
[UPnP] HTTP request #4: HTTP/1.1 GET /4/stream.wav
[UPnP] HTTP concurrency: 1
[UPnP] Source: 192.168.88.14:35293
[UPnP] Accept: */*
[UPnP] Host: 192.168.88.10:52550
[UPnP] Serving WAV
[UPnP] Accept-Ranges: none
[UPnP] Connection: close
[UPnP] Content-Type: audio/wav
[UPnP] Server: Windows, UPnP/1.0 DLNADOC/1.50, foobar2000/1.x
[UPnP] TransferMode.dlna.org: Streaming
[UPnP] transport op: Play
[UPnP] transport op "Play" fail: user abort after 0:00.004894
Unrecoverable playback error: UPnP device error: XML error
[UPnP] Detached transport op failure: XML error
[UPnP] HTTP request #4 finished
[UPnP] HTTP concurrency: 0