Examples don't work

[OrangeFlag]

Hello, you examples don't work and i don't now why, please help me

WARNING:root:Disabling moodbar attr, no binary found in PATH.
WARNING:root:Disabling bpm attr, no binary found in PATH.
Traceback (most recent call last):
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/song.py", line 116, in distance_compute
return self._dist_dict[other_song]
KeyError: <Song(uid=1 values=[(2,), (2,), None, ((321,), (583, 10)), None, None, ['heldentod']], distances=[])>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/yorick/Git/MusicSelectionWeb/Recommendation/Recommendation.py", line 26, in
})] = idx
File "/usr/lib64/python3.6/contextlib.py", line 88, in exit
next(self.gen)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/session.py", line 648, in transaction
self.database.rebuild()
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/database.py", line 262, in rebuild
self.rebuild_stupid()
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/database.py", line 244, in rebuild_stupid
distance = Song.distance_compute(song_a, song_b)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/song.py", line 128, in distance_compute
distance_dict[key] = distance_func(value_a, value_b)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/distance/init.py", line 37, in call
return self.compute(list_a, list_b)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/distance/init.py", line 41, in compute
lefts = self._provider._lookup(lefts)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/provider/init.py", line 60, in _lookup
return tuple(self._store[:idx] for idx in idx_list)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/munin/provider/init.py", line 60, in
return tuple(self._store[:idx] for idx in idx_list)
File "/home/yorick/Git/MusicSelectionWeb/venv/lib64/python3.6/site-packages/bidict/_base.py", line 410, in getitem
return self._fwdm[key]
TypeError: unhashable type: 'slice'