Discussion on: Unable to navigate to pages in react (MERN app) which is deployed on Heroku

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I had the same issue. I fixed it the following way:

once you have built the react app with npm build command then you need to go to public directory and add a new file called:

_redirects

content of the file should be:

/* /index.html 200

That is aalo not working. Do I need to mention that file in somewhere?

no does not need to be mentioned anywhere. but again you have a MERN app. I had CRA app so that is why this solution might not apply to your project.

Oh may be that's the reason