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I have an oppo N1 phone and the camera in it isn’t working , when I start the camera app it says (error connot connect to camwea) and then the phone restart immediately the same thing happens when I start the flash or try to send a picture .. my brother upgraded the Android version to Android 5.1 blisspop . And he said the camera was working and then it stopped ( on the last Android version it wasn’t) . And I tried to delete cash ,restart the phone …and all it’s still the same .. can you please help ??!

Have you done a hard reset already? Found a video on youtube that might help. https://www.youtube.com/watch?v=LsQPdah1