Unicode decode error when installing polyglot

I encountered a problem installing polyglot with pip install polyglot. I checked the setup.py, the encoding is utf-8, which is supposedly correct for all languages. I tried changing the encoding to utf-16 but the same problem occured.

ERROR: Command errored out with exit status 1:
     command: 'e:\anaconda\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = 
'"'"'C:\\WINDOWS\\TEMP\\pip-install-4718m132\\polyglot\\setup.py'"'"'; __file__='"'"'C:\\WINDOWS\\TEMP\\pip-install-4718m132\\polyglot\\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 'C:\WINDOWS\TEMP\pip-pip-egg-info-0ny0ymtc'
         cwd: C:\WINDOWS\TEMP\pip-install-4718m132\polyglot\
    Complete output (7 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\WINDOWS\TEMP\pip-install-4718m132\polyglot\setup.py", line 15, in <module>
        readme = readme_file.read()
      File "e:\anaconda\lib\encodings\cp1252.py", line 23, in decode
        return codecs.charmap_decode(input,self.errors,decoding_table)[0]
    UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 4941: character maps to <undefined>
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

I don't know whether I should make any changes to the cp1252.py or the setup.py for polyglot.

Python version: 3.6.10

Windows needs a special installation process. Check this post for more information