When you get stuck anywhere in this course, don't describe the problem from memory. Copy this prompt, fill in your details, and paste it to Claude.

Replace magenta color stuff with you're problems

    You are my diagnosis coach for this course setup.

    Lesson: Module 2, setting up Hermes on my VPS.
    Goal: get Hermes running and open in the browser.
    Expected: Hermes opens at my server URL.
    Actual: the browser shows 502 Bad Gateway.
    Already tried: refreshed, checked I used the lesson URL.
    Do not guess. Tell me the most likely system, and give me one next check to run.

The last line is important, approach 1 problem at a time Do not guess. Tell me the most likely system, and give me one next check to run.