The Camera app, just like all other apps on the phone, has its cache files. With time, the cache files get accumulated on your phone eating up a large chunk of the storage space.
This has the attendant effects of slowing down your phone’s performance and making your Camera app and other apps malfunction.
If your Camera has stopped working, you can fix it by clearing the Camera app’s cache files.
- Head to Settings > App management > App settings
- In the list of all apps on Android, tap the Camera app
- Press Storage & Cache > Clear cache
- Open the app again to see if the camera works fine