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when I signed in an error screen came up with the words: Can't find variable: requestIdleCallback

Lesley Anne Rose 0 Reputation points
2026-02-22T16:04:14.16+00:00

when I signed in an error screen came up with the words: Can't find variable: requestIdleCallback

followed by try again and a box full of code


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  1. Hendrix-C 12,030 Reputation points Microsoft External Staff Moderator
    2026-02-22T19:08:44.0633333+00:00

    Hi @Lesley Anne Rose,

    Thank you for posting your question in the Microsoft Q&A forum.

    Based on your sharing, that error message usually appears when the browser you’re using doesn’t support a required web feature.

    For further assistance, could you provide more detailed information about this situation, specifically the full wording of the error message and also some screenshots of the issue? I greatly appreciate you understanding and cooperation.

    • Which app/site were you signing into? If you are using browser, which is the browser?
    • What device are you on? (Windows/Mac/iPhone/Android)
    • Can you share a screenshot of the full wording of the error page?

    Please understand that my initial response may not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

    Thank you for your understanding and cooperation. I look forward to hearing from you.


  2. Q&A Assist
    2026-02-22T16:04:28.1366667+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    The error message "Can't find variable: requestIdleCallback" typically indicates that the browser does not support the requestIdleCallback function, which is used for scheduling background tasks. This can happen if you are using an outdated browser or if there are compatibility issues with the current browser settings.

    To resolve this issue, you can try the following steps:

    1. Update your browser: Ensure that you are using the latest version of your web browser, as older versions may not support certain JavaScript functions.
    2. Check browser compatibility: If you are using a browser that does not support requestIdleCallback, consider switching to a more modern browser like Chrome, Firefox, or Edge.
    3. Clear browser cache: Sometimes, cached data can cause issues. Clear your browser cache and cookies and then try signing in again.
    4. Disable extensions: Browser extensions can sometimes interfere with web applications. Try disabling any extensions and see if that resolves the issue.
    5. Try a different browser: If the problem persists, try accessing the application using a different web browser to see if the issue is specific to the one you are currently using.

    If these steps do not resolve the issue, you may want to contact your system administrator for further assistance.

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