childName cannot be null or empty with camera in Android Studio

When I run it, I get an error saying that childName cannot be null. The variable "data" is getting null when taking the photo and I don't know how to fix it.

This is my code.

public class TakePhoto extends AppCompatActivity {

    private Button btnPhoto;
    private ImageView mImageView;

    private static final int CAMERA_REQUEST_CODE = 1;

    private StorageReference storage;

    Calendar c = Calendar.getInstance();
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
    String fecha = df.format(c.getTime());
    private ProgressDialog progress;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_take_photo);

        storage = FirebaseStorage.getInstance().getReference();

        btnPhoto = (Button) findViewById(R.id.buttonCamera2);
        mImageView = (ImageView) findViewById(R.id.fotoFinal);

        progress = new ProgressDialog(this);

        btnPhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(intent, CAMERA_REQUEST_CODE);
            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK){
            Uri uri = data.getData();
            StorageReference filepath = storage.child(getIntent().getStringExtra("dato")).child(fecha + " " + uri.getLastPathSegment());
            filepath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                    Toast.makeText(TakePhoto.this, "Subiendo...", Toast.LENGTH_LONG).show();
                }
            });
        }
    }
}