Thanks mate, I have resolved it, I went to my device manager and I Uninstalled the camera driver and it worked fine and also the main camera still works so I guess it has been solved.
I have had my dell xps 13 9365 for a while now, and works fine with the windows hello face login, now I realized that the normal camera now interferes with the hello face login(the white camera led blinks which doesn't before whenever I want to login) which now tells me it couldn't recognize me and I have to use my pin or fingerprints.  I have had my camera disabled under my device manager now and it works fine but I want to get a lasting solution because it wasn't like that before
Xps 13 9365 camera interference