FMGo has to have permission to use the camera.
To give permission to FMGo, go to setting, FMGo, then turn camera on. You will have to give each version of FMGo that will be using the camera on said device. From your statement FMGo 13 and FMGo 14 has the permission for the camera turned on and FMGo15 camera is turned off.
That was it and I thank you. Forgot my basic FMGO 101 training.
Dan in Sunny Calif.