Camera runs even if training fails (rectangles will still draw).
Faces: 0Mode: detectCam: userPeople: 0
If you see rectangles but all labels are Unknown, it means
training images didn’t load / no face found in them. Use
Reload Training after fixing
data/faces.json and images/faces/.
Errors & Debug
Everything is shown here (404 images, no-face images, JSON parse
issues).