a problem was detected with the true depth camera
Good news is those with this error a problem was detected with the true depth camera. Face ID has been disabled - is that in most situations it can be fixed with a few simple solutions. Hopefully this video helps and for those with anything a bit more complex please drop a comment below.
Here are some links mentioned in the video:
Apple Support - https://getsupport.apple.com/?caller=...
How to backup and restore your iPhone - https://support.apple.com/kb/ph12521?...