How do I set up my react-hot-loader to react to changes instantly?

I am building a very simple, 'Hello World' style server using MongoDB, React, Babel, Node.js, Webpack, Express, and a couple other software modules. I am able to build, compile, and run said server, but hot-loader never updates the DOM. I get no errors in my terminal and my server otherwise runs fine, but in my browser console I get the following:

Uncaught EvalError: Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "script-src 'self'".

at Object../node_modules/webpack-hot-middleware/client.js?reload=true (bundle.js:1197:1)
at __webpack_require__ (bundle.js:726:30)
at fn (bundle.js:101:20)
at Object.0 (bundle.js:1287:1)
at __webpack_require__ (bundle.js:726:30)
at bundle.js:793:37
at bundle.js:796:10

My non-dev dependencies associated with hot-loader and listed in my package.json are the following (Outdated versions were required for the server I'm making, although I was never told why):

-Node: 13.12.0
-NPM: 6.14.4
-@hot-loader/react-dom: 16.13.0
-Express: 4.17.1
-MongoDB: 3.5.5
-React: 16.13.1
-React-DOM: 16.13.1
-React-hot-loader: 4.12.2

The loader exports my module const (HelloWorld), but only once and never updates it if I change the text in any way. Is there a simple mistake I'm making? I would be happy to provide more code if needed.

My HelloWorld.js, responsible for the export:

import { hot } from 'react-hot-loader'
import React from 'react'

const HelloWorld = () => {
    return (
        <div>
          <h1>Hello World!</h1>
        </div>
      )
}

export default hot(module)(HelloWorld)

Here is my main.js, responsible for rendering elements in the root:

import { hot } from 'react-hot-loader'
import React from 'react'
import { render } from 'react-dom'
import HelloWorld from './HelloWorld'


render(<HelloWorld/>, document.getElementById('root'))

What should I include in HelloWorld or Main that allows my hot-loader to update my page in real time as quickly as possible? Thank you for your time and I apologize if my question is disorderly or confusing. I often have trouble speaking concisely.

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