First of all, everything works fine when running on localhost.

I have just started learning mern and i making a simple app where i have to add items into a menu , update and delete them. for updating i want to pre populate the input field with the item data.

I’m running a little MERN stack project. I was able to deploy it on Vercel and get it to run. I can use the buttons in the browser to get to “/classes” and “/students”, however when I reload on either of those pages, it says it cannot GET “/classes” or “/student”