title: Enviroment Error when I try to install flask-bootstrap
body: <p><img src="https://i.stack.imgur.com/SOuCx.png" alt="enter image description here" /></p>
  <p>I've tried several things like checking if I'm behind a proxy restarting web sock and my computer but nothing worked. The command I'm using to install is
  <code>pip install flask-bootstrap</code> or <code>pip3 install flask-bootstrap</code>.</p>