#ChatGPT Office add-in fails to complete WebAuthn/passkey authentication flow preventing login

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proven spadeBOT
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Reported by @fleet quiver

Bug Report: ChatGPT Office add-in fails to complete WebAuthn/passkey authentication flow preventing login
`Steps to Reproduce`
  1. Use an OpenAI account with Advanced Account Security enabled, ie where passkeys/security keys are the only permitted second-factor authentication method.
  2. Open Microsoft PowerPoint for Mac.
  3. Install and/or open the official OpenAI ChatGPT for Excel and PowerPoint add-in.
  4. Select “Continue with ChatGPT.”
  5. Complete the initial OpenAI sign-in steps by entering OpenAI email and pushing "continue"
  6. On the “Verifying it's you” screen, select “Continue with passkey” to complete sign in.
`Expected Result`

The Office add-in should invoke the macOS WebAuthn/FIDO2 authentication prompt, allowing the user to complete authentication with a registered YubiKey/security key (or passkey) and successfully sign in.

`Actual Result`

The add-in reaches the WebAuthn/passkey challenge screen, but selecting “Continue with passkey” does not invoke the macOS WebAuthn/FIDO2 security key prompt. No YubiKey/passkey authentication prompt appears, and the sign-in flow cannot proceed. The sign in browser is frozen on the verifying its you screen, sign in is impossible.

`Environment`

macOS, Microsoft PowerPoint for Mac Version 16.109.3 (26053122), ChatGPT for PowerPoint Office add-in, OpenAI account with Advanced Account Security enabled, Registered YubiKey USB-C 5 Series security key.

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Additional Information

Please provide relevant details to help resolve the issue, such as:

  • ChatGPT Shared Link (if applicable).
  • Screenshots or videos demonstrating the problem.

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