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Try to clear the camera app data and uninstall and reinstall the apps and check if that works.
How to clear data on apps.
1. Tap the Application screen icon.
2. Find and tap Settings > Apps.
3. Swipe to the All tab.
4. Find and tap on the camera app.
5. Tap Force stop > Clear data.
6. Restart the phone
Hi @williamlindh,
I'm sorry to hear that. 
Try Phy's suggestion and clear data for the camera. You can also test the camera in Diagnostics, Settings > About phone > Diagnostics > Test.
hey buddy, did you manage to fix it? I have the same problem. after the latest update my rear camera and flashlight stopped working.. please help someone. clearing cache doesnt help..factory setting either..
You could also try a software repair using PC Companion with the help of a PC.
However, if that doesn't help either you should get in touch with your Local support team and get your phone examined at one of our authorised service centers.
I am also having the same problem.
I clear cache, disable camera app, removed updates and the problem was not fixed after restarting the phone.
Can someone confirm that the only way of getting the camera launch to work again is by doing a phone factory reset, is there another way or nobody really knows what the problem is and we are guessing possible fixes?
Thanks
@Kp6066 If none of the previously mentioned suggestion fixed this I'm afraid you will have to send your device in for repair. Contact your Local support for information on how to proceed further from here.