Hi @عيسى, welcome to our forum and I'm sorry to hear about this. 
I have translated your question to English as this is an International forum, however the translation and the subject includes two different questions, could you please elaborate on the behaviour that you are experiencing?
If you receive any error messages in the camera application, try resetting it by clearing data for the application. You can do so if you go to Settings > Camera > Storage > Clear data > OK. This will not remove any photos or videos that you have taken with your device, it will only reset the camera application.
Let me know if that helps and I'm sorry if I misunderstood your question!
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