To fix the camera problem follow the given troubleshooting:
1. Do a clear cache of the Camera.
2. Reset the camera setting the default.
3. Optimize and reboot your device.
Also, we suggest our users to follow below mentioned when taking the pictures:
1. Please clean the lens with cotton cloth or glasses cloth.
2. Please click on the shutter again after the completion of the focus.
3. Change a brighter place to try.
4. Please choose suitable picture mode and adjust the parameters of the camera settings (if there is a professional model then, you can adjust the camera shutter time sensitivity through professional model parameters such as exposure time).