Mobile page’s hamburger menu and onClick issue

I hope the title properly described the situation I have.

I am a self-taught learner. Forgive me if the title is incorrect. I would appreciate hearing all your comments.

Symptom:
When I click the hamburger menu on the mobile page’s Navigation bar, it disappears and the menu popup function does not work either.

Here is the code or github

Navbar.js

import React, { Component } from "react";
import { MenuItems } from "./MenuItems";

import "./Navbar.css";

class Navbar extends Component {
    state = { clicked: false };

    handleClick = () => {
        this.setState({ clicked: !this.state.clicked });
    };

    render() {
        return(
            <nav className="NavbarItems">
                
                <h1 className="navbar__logo">
                    <a href="/" style={{ textDecoration: "none"}}>JW</a>
                </h1>

                <div className="menu__icon" onClick={this.handleClick}>
                    {/* for the hamburger (bar) menu animation */}
                    <i className={this.state.clicked ? "fas fa-times" : "fas fa-bars"}></i>
                </div>

                <ul className={this.state.clicked ? "nav__menu active" : "nav__menu"}>
                    {MenuItems.map((item, index) => {
                        return (
                            <li key={index}>
                                <a 
                                    className={item.cName} 
                                    href={item.url}>
                                    {item.title}
                                </a>
                            </li>
                        )
                    })}
                </ul>

            </nav>
        )
    }
}

export default Navbar;

MenuItems.js

export const MenuItems = [
    {
        title: 'Skills',
        url: '#skills',
        cName: 'nav__links'
    },
    {
        title: 'Projects',
        url: '#work',
        cName: 'nav__links'
    },
    {
        title: 'Contact',
        url: '#contact',
        cName: 'nav__links'
    },
]

Navbar.css

    .NavbarItems {
    /* background: linear-gradient(90deg, rgb(110, 94, 254) 0%, rgba(73, 63, 252, 1) 100%); */
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;

    overflow: hidden;
    background-color: white;
    position: fixed;
    top: 0;
    width: 100%;
}

.navbar__logo {
    color: #fff;
    justify-self: start;
    margin-left: 20px;
    cursor: pointer;
}

.fa__react {
    margin-left: 0.5rem;
    font-size: 1.6rem;
}

.nav__menu {
    display: grid;
    grid-template-columns: repeat(5, auto);
    grid-gap: 10px;
    list-style: none;
    text-align: center;
    width: 70vw;
    justify-content: end;
    margin-right: 2rem;
}

.nav__links {
    color: black;
    text-decoration: none;
    padding: 0.5rem 1rem;
    font-weight: bold;
}

.nav__links:hover {
    background-color: #6D76F7;
    border-radius: 4px;
    transition: all 0.2s ease-out;
}

.fa__bars {
    color: #fff;
}

.nav__links__mobile {
    display: none;
}

.menu__icon {
    display: none;
}

/* mobile start */
@media screen and (max-width: 960px) {
    .NavbarItems {
        position: relative;
    }

    .nav__menu {
        display: flex;
        flex-direction: column;
        width: 100%;
        height: 500px;
        position: absolute;
        top: 80px;
        left: -100%;
        opacity: 1;
        transition: all 0.5s ease;
    }

    .nav__menu.active {
        background: #6668f4;
        left: 0;
        opacity: 1;
        transition: all 0.5s ease;
        z-index: 1;
    }

    .nav__links {
        text-align: center;
        padding: 2rem;
        width: 100%;
        display: table;
    }

    .nav__links:hover {
        background-color: #7577fa;
        border-radius: 0;
    }

    .navbar__logo {
        position: absolute;
        top: 0;
        left: 0;
        transform: translate(25%, 50%)
    }

    .menu__icon {
        display: block;
        position: absolute;
        top: 0;
        right: 0;
        transform: translate(-100%, 60%);
        font-size: 1.8rem;
        cursor: pointer;
    }

    .fa-times {
        color: #fff;
        font-size: 2rem;
    }

    .nav__links__mobile {
        display: block;
        text-align: center;
        padding: 1.5rem;
        margin: 2rem auto;
        border-radius: 4px;
        width: 80%;
        background: #4ad9e4;
        text-decoration: none;
        color: #fff;
        font-size: 1.5rem;
    }

    .nav__links__mobile:hover {
        background: #fff;
        color: #6568F4;
        transition: 250ms;
    }

    Button {
        display: none;
    }
}