If you've browsed Facer for Apple Watch on your iPhone, you may have seen a message that looked like this:
If you see this error, the face you tried to add to your Apple Watch is not supported by your Apple Watch model, or the version of watchOS you are using.
NOTE: As of September 23rd 2020, a bug in iOS14 and watchOS7 is preventing some users from adding some of the new watchOS7 faces to their device. We expect this bug will be fixed by Apple shortly.