Hi, I’ve got another (two pronged) bug report in Discourse for you. I setup my ThinkPad running Windows 10 for this forum, including setting up Windows Hello as an authenticator.
I signed out and back in to test authentication and I received this error:
The algorithm used for the security key is not recognized.
When I clicked “try again” I got this message:
The provided challenge does not match the challenge generated by the authentication server."
And I was locked out of my account for a few minutes. Once this expired, I logged in with an NFC key to reset any increasing lockout time counter there might be, then logged out and tried again. I got the first error when trying to use Windows Hello. Worse, on the second attempt to sign in (having given up on Windows Hello), I tapped my NFC key… and I got the second error and lockout again!
It appears that there are two problems:
-
Windows Hello does not work properly.
-
A failed security key authentication attempt creates a “try again” button that does not work, possibly because it is re-using the original challenge cached in some place, creating the challenge mismatch error.
Sorry to keep reporting bugs but I figured it helps squash them 
Oh, and as I type this, a third error - both the editor and preview are splitting words mid-word when I copy/pasted Markdown from Visual Studio Code. The things I’m typing directly are rendering correctly, however. EDIT - once posted, the rendering was fixed, and it is correct in the editor now - so this seems to be an issue when pasting into the editor (or at least, pasting in from VSCode on Windows into Chrome).
