cartans

A couple days back I started having a problem opening up my phone's camera. Whenever I open the camera app, it takes me to a black screen and it says, "Failure to start preview." I've had this problem happened to me before but it would usually go away with a phone restart. Not this time tho, it's been like that for several days now. It's frustrating because I want to use it but it does not load up. Any one else running across the same problem as me?