When attempting to load the album with the url http://127.0.0.1:8000/openalbum?id=eaa76f67-cb64-48a8-81e6-d744020c4f6b&t=1493212259 Picard would throw multiple division by error traces like the following in track.py that would result in the loading of the album to never complete.

E: 17:18:10 Traceback (most recent call last):
File "/usr/lib/picard/picard/album.py", line 303, in _finalize_loading_track
run_track_metadata_processors(self, tm, self._release_node, track_node)
File "/usr/lib/picard/picard/metadata.py", line 315, in run_track_metadata_processors
_track_metadata_processors.run(tagger, metadata, track, release)
File "/usr/lib/picard/picard/plugin.py", line 273, in run
function(*args, **kwargs)
File "/home/bob/.config/MusicBrainz/Picard/plugins/lastfmng/_init_.py", line 77, in track_metadata_processor
lfmws = LastFMTagger(album, metadata, release_node)
File "/home/bob/.config/MusicBrainz/Picard/plugins/lastfmng/plugin.py", line 193, in _init_
super(LastFmMixin, self)._init_(album, metadata, release_node)
File "/home/bob/.config/MusicBrainz/Picard/plugins/lastfmng/plugin.py", line 39, in _init_
self._load_tracks(release_node, album)
File "/home/bob/.config/MusicBrainz/Picard/plugins/lastfmng/plugin.py", line 64, in _load_tracks
track._customize_metadata()
File "/usr/lib/picard/picard/track.py", line 124, in _customize_metadata
self._convert_folksonomy_tags_to_genre()
File "/usr/lib/picard/picard/track.py", line 142, in _convert_folksonomy_tags_to_genre
taglist.append((100 * count / maxcount, name))
ZeroDivisionError: integer division or modulo by zero

I corrected the issue with the following patch and everything appears to work ok.

— track.py.orig 2015-01-06 16:01:43.000000000 -0600
+++ track.py 2017-04-26 17:26:35.177918640 -0500
@@ -137,6 +137,8 @@
return

1. Convert counts to values from 0 to 100
   maxcount = max(tags.values())
   + if maxcount == 0:
   + maxcount = 1
   taglist = []
   for name, count in tags.items():
   taglist.append((100 * count / maxcount, name))