Installed, but after that nothing works.

[k2s09]

Ubuntu 20.04,
Python version 3.8.5
Installing message (pip3 install xkcd-dl):

Collecting xkcd-dl
  Downloading xkcd-dl-0.1.2.tar.gz (13 kB)
Collecting beautifulsoup4==4.4.1
  Downloading beautifulsoup4-4.4.1-py3-none-any.whl (81 kB)
     |████████████████████████████████| 81 kB 807 kB/s
Collecting python-magic==0.4.10
  Downloading python-magic-0.4.10.tar.gz (4.0 kB)
Collecting requests==2.8.1
  Downloading requests-2.8.1-py2.py3-none-any.whl (497 kB)
     |████████████████████████████████| 497 kB 2.3 MB/s
Building wheels for collected packages: xkcd-dl, python-magic
  Building wheel for xkcd-dl (setup.py) ... done
  Created wheel for xkcd-dl: filename=xkcd_dl-0.1.2-py3-none-any.whl size=9474 sha256=467c59d454051e43fd8a9a40dfd81030d1493b623abe3d7ffba3b835714da7d9
  Stored in directory: /home/bawse69/.cache/pip/wheels/5c/04/03/a4b0774b2d78efb7ecbc883568913b333c52d6d47f15d883e9
  Building wheel for python-magic (setup.py) ... done
  Created wheel for python-magic: filename=python_magic-0.4.10-py3-none-any.whl size=4214 sha256=d666fcb216df708acce1446a88a2f271508c1abab1c45692d439b775fc8bf654
  Stored in directory: /home/bawse69/.cache/pip/wheels/b4/4a/23/cc7d0113212a0146b392420e7968a909ca14377c0b3fd068a7
Successfully built xkcd-dl python-magic
Installing collected packages: beautifulsoup4, python-magic, requests, xkcd-dl
Successfully installed beautifulsoup4-4.4.1 python-magic-0.4.10 requests-2.8.1 xkcd-dl-0.1.2

When I do --update-db, message received is:

Traceback (most recent call last):
  File "/home/bawse69/.local/bin/xkcd-dl", line 5, in <module>
    from xkcd_dl.cli import main
  File "/home/bawse69/.local/lib/python3.8/site-packages/xkcd_dl/cli.py", line 21, in <module>
    from bs4 import BeautifulSoup as bs4
  File "/home/bawse69/.local/lib/python3.8/site-packages/bs4/__init__.py", line 30, in <module>
    from .builder import builder_registry, ParserRejectedMarkup
  File "/home/bawse69/.local/lib/python3.8/site-packages/bs4/builder/__init__.py", line 314, in <module>
    from . import _html5lib
  File "/home/bawse69/.local/lib/python3.8/site-packages/bs4/builder/_html5lib.py", line 70, in <module>
    class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):
AttributeError: module 'html5lib.treebuilders' has no attribute '_base'

Same traceback error is received when I do just xkcd-dl. Should I try python 2?