Codex Web: "Failed to create task" when starting a new cloud task

What version of Codex is running?

Codex Web / ChatGPT browser task creation UI. Exact version not shown in UI.

What subscription do you have?

ChatGPT Plus.

What issue are you seeing?

When trying to create a new Codex cloud task from the browser UI, Codex shows a red toast error:

Failed to create task

The task is not created. The failure happens at the task-creation screen before Codex starts running.

What steps can reproduce the bug?

1. Open Codex Web in the browser.
2. Select a connected GitHub repository / coding environment.
3. Paste a normal task prompt into the "What should we code next?" task-creation screen.
4. Submit the task.
5. Observe the red toast: Failed to create task.

What is the expected behavior?

Codex should create the task, initialize the cloud environment, and begin running the prompt.

What do you see instead?

Codex does not create the task and only shows the generic Failed to create task toast. There is no visible explanation of whether this is caused by repository setup, environment setup, account quota, prompt length, service failure, or another issue.

Additional information

• Observed date: 2026-05-04.
• UI context: Codex Web task-creation page in ChatGPT browser UI.
• Screenshot is available from the reporter showing the red Failed to create task toast on the Codex task creation screen.
• A similar older issue exists at #3544, but that issue is closed and this is being reported as a current recurrence.
• The error message is too generic to distinguish user-actionable setup issues from a service-side failure. A more specific error would be very helpful, e.g. environment missing, repository access issue, quota/concurrency limit, backend error, prompt too long, or GitHub integration failure.

Reporter notes

Browser/OS, console/network error details, and exact environment ID were not captured yet. I can add them if needed.