covergoobus crashes on spotify "label name c is not defined

[Lalo Arroyo]

when I use covergloobus with Spotify crashes whit the next error:

Traceback (most recent call last):
  File "/usr/share/covergloobus/players/Spotify.py", line 211, in check_new_song
    self._last_album = wikilyrics_get_album(artist, title)
  File "/usr/share/covergloobus/core/utils.py", line 53, in wikilyrics_get_album
    c.debug("Getting Album: " + url)
NameError: global name 'c' is not defined

Can someone help?