GitHub Pages Page Not Found for React App

I am trying to publish my single page website to github pages, but I've run into an issue. When I go to the link for my website, it gives me a 404 error with this message: "File not found. The site configured at this address does not contain the requested file. If this is your site, make sure that the filename case matches the URL. For root URLs (like http://example.com/) you must provide an index.html file."

I've looked at the documentation, watched videos, and looked up other people who are having this issue, but nothing will solve it.

I have a main and a gh-pages branch. Right now I have it set to build from the gh-pages branch. If I change it to main I get the same issue.

Here is my package.json file:

  "homepage": "http://bpyle02.github.io/portfolio",
  "name": "portfolio",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@craco/craco": "^6.4.2",
    "@testing-library/jest-dom": "^5.11.4",
    "@testing-library/react": "^11.1.0",
    "@testing-library/user-event": "^12.1.10",
    "aos": "^3.0.0-beta.6",
    "autoprefixer": "9",
    "gh-pages": "^3.2.3",
    "postcss": "7",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-icon": "^1.0.0",
    "react-icons": "^4.3.1",
    "react-router": "^6.0.2",
    "react-router-dom": "^6.0.2",
    "react-scripts": "4.0.3",
    "react-scroll-into-view": "^1.10.1",
    "scroll-into-view": "^1.16.0",
    "tailwindcss": "npm:@tailwindcss/postcss7-compat",
    "web-vitals": "^1.0.1"
  },
  "scripts": {
    "predeploy": "npm run build",
    "deploy": "gh-pages -b main -d build",
    "start": "craco start",
    "build": "craco build",
    "test": "craco test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

Here is the link to the repo: https://github.com/bpyle02/portfolio

Solution

You need to upload only the contents of your build folder to the gh-pages branch. I think it will benefit you to read about how GitHub Pages works.

The create-react-app documentation explains how to address your scenario:

https://create-react-app.dev/docs/deployment/#github-pages

Here's the most important information (without setting this before building your app, it won't work):

Open your package.json and add a homepage field for your project:
"homepage": "https://myusername.github.io/my-app",
Create React App uses the homepage field to determine the root URL in the built HTML file.

This might also be relevant to your app:

https://create-react-app.dev/docs/deployment/#serving-the-same-build-from-different-paths