Can register a passkey on webauthn.io but not use it

Hello @offk! 👋

I'm sorry that you're unable to use your passkey for webauthn.io. Can you tell me what happens when you try to use a passkey to sign in to webauthn.io in Brave or Chrome (focusing on those two browsers first since they're based on the same Chromium engine). Do you see any error messages from either 1Password, your browser, or the webauthn.io webpage? 

Can you also ensure that you're have 1Password in the browser installed in all of your browsers: Get 1Password in the browser

I look forward to hearing from you. 

-Dave