Newly added article not displaying after deploying strapi to heroku

System Information
  • Strapi Version: 3.4.4
  • Operating System: Widnows 10
  • Database: postgreSQL
  • Node Version:
  • NPM Version:
  • Yarn Version:

I tried to create new articles on the deployed site but I cannot open the individual blog page, it always returns me with a blank page that says “An unexpected error has occurred.” I tried running my frontend locally and it is able to fetch and display the article just as expected. I wonder what’s wrong with my process.