Something changed with media player? "Got unexpected return value"

When using Google Say with a Forked Daapd MPD, since I upgraded Home Assistant recently I now get these errors in my logs and no audio played back

      - service: tts.google_say
        entity_id: media_player.mpd_forked
        data_template:
          message: >
            . The weather for the next day is {{states ('sensor.dark_sky_summary_0d') }}. 

mpd.base.ProtocolError: Got unexpected return value: 'playlist: file:/srv/music/playlists/r1, Last-Modified: 2021-02-04T00:17:45Z, playlist: file:/srv/music/playlists/r2, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r3, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r4, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r4x, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r6, Last-Modified: 2021-02-04T00:17:45Z'

Error executing script. Unexpected error for call_service at pos 4: Got unexpected return value: 'playlist: file:/srv/music/playlists/r1, Last-Modified: 2021-02-04T00:17:45Z, playlist: file:/srv/music/playlists/r2, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r3, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r4, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r4x, Last-Modified: 2021-02-04T00:17:46Z, playlist: file:/srv/music/playlists/r6, Last-Modified: 2021-02-04T00:17:45Z'

Just wondered what had changed and how I could fix it ! Thanks