When I try to use Animoji, I see "Tap to resume"

When I try to use Animoji, I get the following message/error: > Tap to resume Additionally, when I tap on my Memoji, I get > Face tracking failed. Tap to retry However, tapping does not resolve the issue. I've also tried a hard reboot/force restart , resetting all settings , and erasing the phone and resetting all settings —and none of those fixed the problem. Face ID seems completely unaffected. What can I do to fix this?