The problem is that docutils 0.17 added some new settings (namely, line_length_limit) that your code (or one of the libraries you’re using) is not setting up properly. It can be worked around by amending the install_requires directive in setup.py as follows:
install_requires=[
"aiohttp>=3.7.3",
"turberfield-catchphrase>=0.18.0",
"docutils<0.17"
]
(See also: Docutils: Documentation Utilities / Bugs / #415 0.17 version incompatibility with some 3rd party code)