Thanks for replying. Should I do something when initially setting up the theme? Like, need some changes in the .env file or mockAxios file to work locally (localhost:3000).

import Axios from "axios";

export const getBlogPosts = async (setter) => {
try {
const res = await Axios.get(`https://jsonplaceholder.typicode.com/posts/1`);

if (res.status === 200 && res?.data) {
setter(res?.data);
console.log('blog post');
}
} catch (error) {
console.log(error.message);
}
};

this is my code.

import React, { useEffect, useState } from "react";
import { getBlogPosts } from "./_helper";
export function TestCustomerCreate() {
const [gridData, setGridData] = useState();
useEffect(() => {
getBlogPosts(setGridData);
}, []);
console.log(gridData);
return (
<div>
<h1>This is test create form</h1>
</div>
);
}

sts code : Request failed with status code 404
error.response: data: undefined