A page is getting 404 only on production

https://www.nowk.kr/blog/4 is receiving 404 error.
other pages are working fine but only this one.
Had checked API on Postman which worked and the page is showing on localhost. I have no idea why it’s not showing on production.

I’m using Next.js and deployed frontend on Vercel, strapi on Heroku.

Found solution from here

Could you share a little more about the problem and the solution as it may help other users?