Error in pip install (also pip3)

pip3 install astmonkey
Collecting astmonkey
Downloading astmonkey-0.3.6.tar.gz (10 kB)
ERROR: Command errored out with exit status 1:
command: /usr/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-91zgj0g2/astmonkey/setup.py'"'"'; file='"'"'/tmp/pip-install-91zgj0g2/astmonkey/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-91zgj0g2/astmonkey/pip-egg-info
cwd: /tmp/pip-install-91zgj0g2/astmonkey/
Complete output (7 lines):
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-install-91zgj0g2/astmonkey/setup.py", line 7, in
long_description = f.read()
File "/usr/lib/python3.6/encodings/ascii.py", line 26, in decode
return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 3079: ordinal not in range(128)
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

More details

• lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 16.04.6 LTS
  Release: 16.04
  Codename: xenial

python3 --version
Python 3.6.10

python --version
Python 3.6.10