why my error is not showing in the frontend? (help-begineer)

"import React, { useState } from "react";
import { Link, useNavigate } from "react-router-dom";
import axios from "axios";

const Register = () => {
const [userData, setUserData] = useState({
name: "",
email: "",
password: "",
password2: "",
});

const [error, setError] = useState("");

const navigate = useNavigate();

const changeInput = (e) => {
setUserData((prevState) => {
return {
...userData,
[e.target.name]: e.target.value,
};
});
};

const registerUser = async (e) => {
e.preventDefault();

try {
  const response = await axios.post(
    `${process.env.React_App_BASE_URL}/users/register`,
    userData
  );
  const newUser = await response.data;
  console.log(newUser);
  if (!newUser) {
    setError("could not register, please try again");
  }
} catch (err) {
  if (err.response && err.response.data) {
    setError(
      err.response.data.message || "Registration failed. Please try again."
    );
  } else {
    setError("An unknown error occurred. Please try again.");
  }
}

};

return (

Sign Up

{error &&

{error}

}

    <input
      type="text"
      placeholder="Name"
      name="name"
      value={userData.name}
      onChange={changeInput}
    />
    <input
      type="email"
      placeholder="Email"
      name="email"
      value={userData.email}
      onChange={changeInput}
    />
    <input
      type="password"
      placeholder="Password"
      name="password"
      value={userData.password}
      onChange={changeInput}
    />
    <input
      type="password"
      placeholder="confirm Password"
      name="password2"
      value={userData.password2}
      onChange={changeInput}
    />
    <button type="submit" className="btn_category">
      Register
    </button>

    {/* <small>Already have an account?</small> */}

    <Link to="/login">Login</Link>
  </form>
</section>

);
};

export default Register;
"

This error is not being shown: "

{error &&

{error}

}

"