TypeError: object of type 'NoneType' has no len()

[thedemonium]

Hello!
After successful authorization and selecting an album for backup:

[2018-08-20 14:16:01,260][Spelt][INFO ] Run in verbose mode
[2018-08-20 14:16:01,260][Spelt][INFO ] Output path is set to: /home/demonium/Spelt/Spelt
[2018-08-20 14:16:09,824][Spelt][DEBUG ] Adds 254040401 to selection
[2018-08-20 14:16:09,825][Spelt][DEBUG ] Selected Albums: ['27.05 Суоранда']
[2018-08-20 14:16:09,825][Spelt][INFO ] Begin downloading 1 album(s)
[2018-08-20 14:16:09,825][Spelt][DEBUG ] Album Size: 11
[2018-08-20 14:16:09,857][Spelt][INFO ] Done in 0:00:08.596581
Traceback (most recent call last):
File "/usr/local/bin/spelt", line 11, in
sys.exit(run_app())
File "/usr/local/lib/python3.6/dist-packages/spelt/init.py", line 313, in run_app
process_albums(albums=selected_albums, output=args.output, vk_session=vk_session)
File "/usr/local/lib/python3.6/dist-packages/spelt/init.py", line 221, in process_albums
photo_urls = get_album_photos(album=album, offset=offset, vk_session=vk_session)
File "/usr/local/lib/python3.6/dist-packages/spelt/init.py", line 143, in get_album_photos
if len(sizes)==0:
TypeError: object of type 'NoneType' has no len()

[amka]

Will check this out as soon as possible, thank you!