organization repo can't deploy

I did many things to show my project on github pages but it didn’t work.

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

I followed this step by step. But when open my github pages, there is only white page. Maybe it works but can’t show anything

It works on localhost well.

Is organization repo can’t deploy on github pages??

https://lee-park-bae-project.github.io/KAKIOTALK  This is our github pages