livekit cannot unmute track, remote unmute is disabled

Question

I mute the participant track in the livekit room and this works fine, but when I want to unmute it through MutePublishedTrack(Muted false) I found an error cannot unmute track, remote unmute is disabled even though I have configured my server via config.yaml like this:

port: 7880
log_level: info
rtc:
  tcp_port: 7881
  port_range_start: 30000
  port_range_end: 40000
  use_external_ip: false
keys:
  devkey: secret
room:
  enabled_codecs:
    - mime: audio/opus
    - mime: audio/red
  enable_remote_unmute: true
turn:
  enabled: false

Is there any configuration I'm missing?