[imgbb] Error downloading album

[rEnr3n]

$ gallery-dl -Kv https://ibb.co/album/kYKpwF
[gallery-dl][debug] Version 1.11.1
[gallery-dl][debug] Python 3.7.4 - Linux-5.3.8-arch1-1-x86_64-with-arch
[gallery-dl][debug] requests 2.22.0 - urllib3 1.25.6
[gallery-dl][debug] Starting KeywordJob for 'https://ibb.co/album/kYKpwF'
[gallery-dl][debug] Updating urllib3 ciphers
[imgbb][debug] Using ImgbbAlbumExtractor for 'https://ibb.co/album/kYKpwF'
[urllib3.connectionpool][debug] Starting new HTTPS connection (1): ibb.co:443
[urllib3.connectionpool][debug] https://ibb.co:443 "GET /album/kYKpwF?sort=date_desc HTTP/1.1" 200 None
[imgbb][error] An unexpected error occurred: AttributeError - 'NoneType' object has no attribute 'lower'. Please run gallery-dl again with the --verbose flag, copy its output and report this issue on https://github.com/mikf/gallery-dl/issues .
[imgbb][debug]
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/gallery_dl/job.py", line 48, in run
    for msg in self.extractor:
  File "/usr/lib/python3.7/site-packages/gallery_dl/extractor/imgbb.py", line 35, in items
    data = self.metadata(page)
  File "/usr/lib/python3.7/site-packages/gallery_dl/extractor/imgbb.py", line 136, in metadata
    "user"      : user.lower(),
AttributeError: 'NoneType' object has no attribute 'lower'