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Common issues and how to resolve them. If none of these help, reach out via Contact & Support.

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Workspace

The workspace relies on remote compilation. Check your network connection and reload the lesson. If it persists, try a different network or report it to support with the course and lesson name.
Make sure your code compiles without errors — a broken state can stop the preview from rendering. Use the AI Tutor to find the issue, then reload the preview.
Confirm GitHub is connected under Settings → Security → Connected social accounts. Reconnect if needed, then retry. See GitHub Sync.

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Account & access

Check that your membership covers that course’s access type. Membership (MEMBER) courses require a paid membership (Basic and above).
Set your default under Settings → Profile → Language, or use the language switcher. Some specific courses may not be translated yet — the English version remains available.
Credits refresh monthly. For more, consider a higher plan — higher tiers also raise your monthly AI Import allowance (Basic 5, Pro 10, Creator unlimited).

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xkat-cli / Local Agent

The xkat-cli agent connects with your Windows host browser. You must run it in a Windows Host terminal (PowerShell or CMD), not inside WSL. Run npx xkat-cli@latest up in Windows PowerShell/CMD.
This occurs when Hyper-V or WSL2 services (winnat) reserve port 38000–38050 in Windows Excluded Port Range.Solution:
  1. Open PowerShell as Administrator.
  2. Restart winnat to release reserved ports:
  3. Run npx xkat-cli@latest up again.