You have 3 things to try to fix it, try them one at a time:
Clear dalvik-cache only;
Clear the camera app settings;
Do a factory reset in TWRP or PhilZ (this should keep your internal storage safe);
flash the ROM package again;
boot until you can test the camera;
If it works go back to recovery to restore a backup of data.
and unfortunately i tries everyone but still issue is thier..... can anyone knows how to fix it....
Before posting your replies please remember that i have lost DRM keys in back and got fixed camera issue by Sony 4.3 update....
any developer or NUTT please help me out