CS 15-122: Principles of Imperative Computation (Qatar Fall 2026)

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Testing your configuration

Common misconfigurations

• You are not signed in to a CMU network.

  Fix: go to the Web Login page.

• The date or time on your computer is invalid.

  Fix: go to your time and date settings.

  • Set the time and date automatically.
• You are using a VPN, which can sometimes cause an issue.

  Fix: disconnect from the VPN.

• Your browser has an old version of the page.

  Fix: refresh the page, switch to a private window, or clear your browser cache.

Problem fixed?