Unable to Send Message while Unity is not Instantiated.

[namjohn920]

Hello I am making a flappy bird

and trying to make the "REACT" text to something when i click my button

and this is my UpdateText function in Unity GameManger file

    public void UpdateText(string inputText)
    {
        Debug.Log("update text");
        Debug.Log(inputText);
        reactText.text = inputText;
    }

          <Button
            href="#"
            sx={{ my: 1, mx: 1.5 }}
            onClick={() => sendMessage("GameManager", "UpdateText", 'yoyo')}
          >
            btn1
          </Button>

and above is my react code.
But i keep getting "react_devtools_backend.js:2655 Unable to Send Message while Unity is not Instantiated."
Why is this happening??
please help.. thank you!

[namjohn920]

I solved it. I was doing it in the other component that did not have . I moved sendMessage function in the the page where is. Now it works.