Catch error and put inside a component ReactJS

I have an issue, this issue is to take an error from my try catch and pass this message error to my custom alert component.

Below is my code:

 export const Register = () => { 
   const dispatch = useDispatch(); 
   
   const [openError, setOpenError] = useState(false);

   const AlertError = openError ? (
    <Dialog open={openError}>
      <AlertCard
        open={openError}
        handleClose={handleCloseError}
        borderTop="1vh solid red"
        color="black"
        severity="error"
        title="Cadastro falhou"
        description='message' //put here message error
      />
    </Dialog>
  ) : (
    ""
  );

 const formik = useFormik({
    initialValues: {
      email: "",
      password: "",
      first_name: "",
      last_name: "",
      confirmPassword: "",
      newsletter: "",
    },
    validationSchema: validationSchema,
    onSubmit: async (values) => {
      setIsLoading(true)
      dispatch(signupUserPending());
      dispatch(requestConfirmEmailPending());
      try {
        if (document.getElementById("checkbox").checked) {
          values.newsletter = "on";
        }
        const singUpRes = await signup(values);
        dispatch(signupUserSuccess(singUpRes));
        dispatch(getUserSuccess(singUpRes));
        dispatch(getTokenSuccess(singUpRes));

        const confirmEmailRes = await requestConfirmEmail(singUpRes.user.email);
        dispatch(requestConfirmEmailSuccess(confirmEmailRes));
        setOpenSuccess(true);
        navigate("/confirm-token");

      } catch (err) {
        console.log(err.message); //need take this message error
        dispatch(signupUserFailure(err));
        dispatch(requestConfirmEmailFailure(err));
        setIsLoading(false);
        setOpenError(true);
      }
    },
  });

  return ({AlertError}...rest of code)
} 

I need to catch a message error which come from the backend, and put this error inside my props description on my custom alert error. But I don't know how to make this. I tried make this for some hours but could not achieve success.

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