Everyone,
Just in case you may run in to this issue with the new version of macOS, below is what solved the issue for me.
The new macOS has a new permission option for applications to utilize different resources such as the Camera.
1. Open the Settings panel
2. Select Security & Privacy
3. On the left hand side scroll down to Camera
4. On the right hand side under Allow the apps below to access your camera, check the box next to the Face3D tracer application
5. Save your changes