Account and sign-in
The sign-in challenge expired
challenge_expired
A sign-in, invite, or anti-spam challenge took too long and is no longer valid.
HTTP 400·Account and sign-in
What it means
What happened
A sign-in, invite, or anti-spam challenge took too long and is no longer valid.
Why
Why it might have happened
- Security challenges only last for a short time.
- The page may have been left open before you finished.
Next steps
What you can try
- Start the sign-in or invite flow again.
- Complete the prompt without leaving the page idle.
- Refresh if the page still shows the old challenge.
Related
Related error help
Still stuck?
Get help
If the error keeps happening, send feedback or contact us and include challenge_expired plus what you were trying to do.