Codex Cloud task fails with "An unknown error occurred"

Resolved 💬 0 comments Opened Apr 29, 2026 by tohodov Closed Apr 29, 2026

What issue are you seeing?

Codex Cloud task fails after ~1m12s with "An unknown error occurred".
The Logs tab is empty.
The same task failed 3 times

What steps can reproduce the bug?

  1. Fork dotnet/roslyn.
  2. Start any non-trivial Codex Cloud task on the fork

What is the expected behavior?

The task was completed or an understandable error

Additional information

_No response_

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