Unable to call native camera plugin at startup in Production mode

This is the code.

base64Image = "";

  constructor() {
    this.takePicture();
  }

  takePicture(){
    Camera.getPicture({
        destinationType: Camera.DestinationType.DATA_URL,
        targetWidth: 1000,
        targetHeight: 1000
    }).then((imageData) => {
      // imageData is a base64 encoded string
        this.base64Image = "data:image/jpeg;base64," + imageData;
    }, (err) => {
        console.log(err);
    });
  }