# FAQ and Troubleshooting
URL: /faq

Answers to common OpenHTF questions and errors — blank Operator UI, unset measurements failing, ERROR vs FAIL outcomes, phase timeouts, tornado version conflicts, Python support, and how OpenHTF relates to TofuPilot.

Questions that come up on Discord and in the GitHub issues, with the shortest working answer. Install-time errors are on the Installation page.

Ask on Discord with your OpenHTF version (`python -c "import openhtf; print(openhtf.__version__)"`), the full traceback and the smallest script that reproduces it.

<Card title="Installation problems" href="/installation#common-install-problems" description="pip and dependency errors." />

<Card title="Test Options" href="/test-options" description="failure_exceptions, stop_on_first_failure, default_dut_id." />

<Card title="Community" href="/community" description="Discord, GitHub, email." />