Flashlight + Camera view Problem

Hello guys i am making an online Qr scanner using this pluggin: https://github.com/kefniark/UnityBarcodeScanner the scanner works amazingly, the best i have seen, but on my case, i have an external problem, the LIGHT. i have to do the scan on some places where the ilumination is not good at all. the proper solution would be using the phone flashlight ( or torch).

 void Start () {
         
         anim = menuDesplegable.GetComponent<Animator> ();
     
         DontDestroyOnLoad (gameObject);
 
         // Create a basic scanner
         BarcodeScanner = new Scanner();
         BarcodeScanner.Camera.Play();
 
         // Display the camera texture through a RawImage
         BarcodeScanner.OnReady += (sender, arg) => {
             // Set Orientation & Texture
             Image.transform.localEulerAngles = BarcodeScanner.Camera.GetEulerAngles();
             Image.transform.localScale = BarcodeScanner.Camera.GetScale();
             Image.texture = BarcodeScanner.Camera.Texture;
 
             // Keep Image Aspect Ratio
             var rect = Image.GetComponent<RectTransform>();
             var newHeight = rect.sizeDelta.x * BarcodeScanner.Camera.Height / BarcodeScanner.Camera.Width;
             rect.sizeDelta = new Vector2(rect.sizeDelta.x, newHeight);
         };
 
         // Track status of the scanner
         BarcodeScanner.StatusChanged += (sender, arg) => {
             TextHeader.text = "Status: " + BarcodeScanner.Status;
         };
     }
 
     /// <summary>
     /// The Update method from unity need to be propagated to the scanner
     /// </summary>
     void Update()
     {
         if (BarcodeScanner == null)
         {
             return;
         }
         BarcodeScanner.Update();
 
         //
         if (Input.GetKeyDown ("space")) 
         {
 
             StartCoroutine ("Getname", "uhgaTV2V22");
             //Getname("bTZ58c4uwg");
         
         }
 
     }
 
     #region UI Buttons
 
     public void ClickStart()
     {
         if (BarcodeScanner == null)
         {
             Log.Warning("No valid camera - Click Start");
             return;
         }
 
         // Start Scanning
         BarcodeScanner.Scan((barCodeType, barCodeValue) => {
             BarcodeScanner.Stop();
             TextHeader.text = "Found: " + barCodeType + " / " + barCodeValue;
 
             // Feedback
             Audio.Play();
             // consulta a la base de datos
         //    InsertQR(barCodeValue);
             StartCoroutine ("Getname", barCodeValue);
 
 
             #if UNITY_ANDROID || UNITY_IOS
             Handheld.Vibrate();
             #endif
 
             BarcodeScanner.Stop();
         });
     }
 
     public void ClickStop()
     {
         if (BarcodeScanner == null)
         {
             Log.Warning("No valid camera - Click Stop");
             return;
         }
 
         // Stop Scanning
         BarcodeScanner.Stop();
     }
 
     public void ClickBack()
     {
         // Try to stop the camera before loading another scene
         StartCoroutine(StopCamera(() => {
             SceneManager.LoadScene("Boot");
         }));
     }
 

this is the code which is working 100% nicely. If i want to turn on the light, i use this:

     void FL_Start()
     {
         AndroidJavaClass cameraClass = new AndroidJavaClass("android.hardware.Camera");       
         WebCamDevice[] devices = WebCamTexture.devices;
 
         int camID = 0;
         camera1 = cameraClass.CallStatic<AndroidJavaObject>("open", camID);
 
         if (camera1 != null)
         {
             AndroidJavaObject cameraParameters = camera1.Call<AndroidJavaObject>("getParameters");
             cameraParameters.Call("setFlashMode", "torch");
             camera1.Call("setParameters", cameraParameters);
             camera1.Call("startPreview");
             Active = true;
 
         }
         else
         {
             Debug.LogError("[CameraParametersAndroid] Camera not available");
         }
 
     }
 
     void OnDestroy()
     {
         FL_Stop();
     }
 
     void FL_Stop()
     {
 
         if (camera1 != null)
         {
             camera1.Call("stopPreview");
             camera1.Call("release");
             Active = false;
         }
         else
         {
             Debug.LogError("[CameraParametersAndroid] Camera not available");
         }
 
     }
 
     public void Torch()
     {
         
         if (torchOn)
         {
             FL_Stop();
             torchOn = false;
         } 
         else 
         {
             FL_Start();
             torchOn = true;
         }
 
     }
 

This code also works 100% nicely for turning on the flashlight. but when i want to use both at same time, once the light is on, the raw image used to display the camera view freezes..

I have been struggling for some time with this.. i would love some captain suggestions :D thanks in advance