2FA: "key not found" error when trying to use my Titan v2 USB-C security key

I'm pretty fluid on that. This is actually what I see on Android. USB-C Chrome

It looks like we ran into an issue setting up your security key. If this was not intentional, click Retry or use a different security key.

This security key is already registered with your account

Hey dajo, would you mind clarifying the browser you're using on your end, please? 

Ah, I see my link to the stats page has been deleted. The key follows both of these standards:

• FIDO Universal 2nd Factor (U2F)
• Web Authentication (WebAuthn), also known as FIDO2

Google, the key's developer, was involved in the development of the FIDO2 standard.

Thanks for posting on our forum, dajo.

Can you double check if your security key follows the required standards that are mentioned here?

If it does, please let me know and we’ll look into this further.