reactjs project working fine on local...but not working after deployment...any suggestion?

I'm trying to deploy my first reactjs app. (It's a quiz app) In local the app is working fine.. after deploy is not working as expected. Here you can find the deploy version and a soon you start to play answering the first question you will notice the problem that the question is not changing. Here is the github repository. I did google a lot , I try to deploy it in both github and netlify but I can't manage to resolve this problem. Any help is appreciate. Thanks

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