title: ERROR: Could not install packages due to an EnvironmentError
body: <p>Trying to install flask, a python library for the web.
  I have the error :</p>
  
  <p><code>ERROR: Could not install packages due to an EnvironmentError: Could not find a suitable TLS CA certificate bundle, invalid path: path/to/ca-bundle.crt.</code></p>
  
  <p>No matter what library I try to install, I come back to the same problem.
  It's been doing this to me for the last week when I could "pip install everything" before.</p>
  
  <p>I am on macOS Catalina (10.15), I use Iterm and Pycharm. </p>
  
  <p>By typing: <code>python --version</code> in the terminal, I get <code>Python 3.7.4</code>. I think I've described the situation well, don't hesitate to ask me questions about my system or anything. </p>
  
  <p>Anyone have an idea to fix this problem? </p>
  
  <p>Thank you in advance, </p>
  
  <p>Paul</p>