Face ID Not Working [Fixed. Please see the approved answer for details.]

Hi folks:

@shadowplayer:

A good way to reproduce the error is just repeatedly fill the same password field. It will eventually fail.

This is actually something separate from the issue where Face ID / Touch ID isn't available at all. We're investigating this as well. As for the issue where

ref: dev/core/core#16892

@mikiwa:

We're still investigating the cause of this. We do have a solution that's worked for other people running into this, but as it requires factory resetting your iPhone and restoring from an iCloud backup, it's definitely something that should be done at your own risk. Let me know if you'd like to go further and I can share the steps with you. We're hoping to know more soon on this issue, so waiting for the fix would be recommended, but if you'd like this sorted out right away, we do have options.

Jack