Gh-pages 404 error when deploying React app

I am having issues with gh-pages deployment for my React app, and it was working fine earlier in my project. It looks like it begins to load and then I get:

404
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.

Read the full documentation for more information about using GitHub Pages.

The console reads: “Failed to load resource: the server responded with a status of 404 ()”

Everything in my code looks ok to my eyes, I have an index.html file as required. Any help is greatly appreciated.

Repo: GitHub - emilydowney/Meet
Gh-pages: https://emilydowney.github.io/Meet/undefined

Did you already delete the repo Meet? It’s also 404. I cannot check the problem anymore.