Flask Server Returns 404 On Localhost:5000 W/ Twilio

I'm following this guide (Python Quickstart: Replying to SMS and MMS Messages) to try and set up a flask server, but when I try to connect to http://localhost:5000 I get a 404 erro

Solution 1:

I can connect to http://127.0.0.1:5000/ after restarting my computer. Not sure what was causing the issue.