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codex - 💡(How to fix) Fix Codex Web: "Failed to create task" when starting a new cloud task [5 comments, 6 participants]

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openai/codex#21179•Fetched 2026-05-06 06:25:19
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Error Message

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

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

Root Cause

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.

Code Example

Failed to create task
RAW_BUFFERClick to expand / collapse

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.

extent analysis

TL;DR

Check the repository setup, environment configuration, and account quota to identify potential causes of the task creation failure.

Guidance

  • Verify that the connected GitHub repository and coding environment are properly set up and configured.
  • Check the account quota and concurrency limits to ensure they are not being exceeded.
  • Provide additional details such as browser/OS, console/network error details, and exact environment ID to help further diagnose the issue.
  • Compare the current setup with the older issue #3544 to see if there are any similarities or differences that could help identify the cause.

Example

No code snippet is provided as the issue is related to a UI error message and not a specific code problem.

Notes

The generic error message "Failed to create task" makes it difficult to determine the root cause of the issue. More specific error messages or additional logging would be helpful in diagnosing the problem.

Recommendation

Apply workaround: Provide additional details and verify setup configurations to help identify the cause of the issue, as the problem may be related to a specific setup or configuration rather than a version issue.

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#agent execution#callback error#memory management#API rate limit#environment setup

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