“ERROR:root:code for hash md5 was not found” when using any hg mercurial commands

Question

When trying to use any hg Mercurial commands on the console, I keep getting this error. I installed Python using Homebrew and I am running Mac OS Catalina v. 1

Answer 1

My problem was having pyenv installed and pointing to an old python 2 version

Uninstall python@2 (python2 was EOL since Jan 1st, 2020)

$ brew uninstall python@2
Uninstalling /usr/local/Cellar/python@2/2.7.15_1... (4,169 files, 76.0MB)

then

$ pyenv versions
  system
* 2.7.12 (set by /Users/admin/.python-version)
  3.4.5
  3.7.7

$ pyenv local system
$ pyenv global system