Capital letters in repo name might be an issue.

[LarsTheGlidingSquirrel]

Github pages gave me a 404 error message after deploying. Using only lower case letters in the repository name solved the issue in my case.

[KingJordan152]

Thank you so much, this fixed my issue!

[gitname]

Interesting! I have not tested this (as a result, I have never observed it either). What operating system were you using when you observed this (e.g. Windows, Linux, macOS)?

[RokeJulianLockhart]

#issue-634601592

@LarsTheGlidingSquirrel, docs.github.com/en/enterprise-server@3.13/pages/getting-started-with-github-pages/creating-a-github-pages-site#creating-a-repository-for-your-site states:

If your user or organization name contains uppercase letters, you must lowercase the letters.