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Asked: 2026-06-02T13:19:18+00:00

I just built my first web app for a class using Google App Engine,

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I just built my first “web app” for a class using Google App Engine, and it deployed correctly, and works perfectly well on Google’s servers. However, when I try to access it on localhost, I get a 500 error:

“Server error The website encountered an error while retrieving http://localhost:8081/. It may be down for maintenance or configured incorrectly.”

I have tried using various ports, and none of them seem to work. I am 100% positive I am using the correct port and that the app is actually running with no errors.

I am using Google Chrome and Python 2.7.2 on Mac OS 10.6.8

Any ideas on how to correct this or what configurations to check?

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1 Answer

  1. Editorial Team

    Turns out, the issue was that GAE was accessing an older version of python on my computer.

    I was able to fix this by opening up the python launcher, copying the path from “Interpreter”, and pasting it into GAE under Preferences/Python Path. In my case, the correct path is /usr/local/bin/pythonw

    It is important to note that as there is no “ok” or “apply” button here, you must hit enter to apply the path change.

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