404 not found error when an Express.js project is deployed

[aparnagopal (Aparna)]

Hello, I am getting the following error while deploying my project - https://vercel.com/aparnagopals-projects/webflow-form-to-cms. This is Express.js script. Please help to resolve.
error:
404: NOT_FOUNDCode: NOT_FOUNDID: bom1::chbg2-1750166097117-15e012a9e9e3

I tried steps explained in FAQ section. Still it is giving the same error and I am not able to understand where is the error.

[system]

There’s another community post with 404 debugging tips that might be helpful. Please give these solutions a try and let us know how it goes.

Debugging 404 Errors

Sometimes things don’t go as expected when deploying a website. If you see a 404 on your site, that means the page or resource couldn’t be found. There are many possible causes, and the absence of something can be tricky debug if you don’t know where to look. Here are some things you can do to find the cause and fix it. Debugging Tips Check the error code If you see a mostly white screen with 404: NOT_FOUND along with a Code and and ID then you can click the blue info box below the error deta…

A human should be around soon to offer more advice. But you can also get helpful information quickly by asking v0.

If you’re having trouble deploying an Express app, this guide can help.

How to Deploy an Express.js Application to Vercel

You can also ask v0 for suggestions tailored to your own project setup.

[pawlean (Pauline P. Narvas)]

Have you had the chance to look at this? Might be helpful!

Express 101: Everything about deploying your Express app on Vercel

Getting started Express.js is one of the most popular framework choices for building a backend using Node.js. If you are starting a new Express project and want to deploy it to Vercel, we recommend you to follow the Using Express.js with Vercel guide. Common patterns If you are coming from an existing project, we’ve put together this example repository to showcase the common development patterns for Express apps. We recommend hosting your frontend application on a separ…

[aparnagopal (Aparna)]

Hello Pauline,

I tried the suggestions in the Using Express.js with Vercel.
Also, created the example project mentioned in that page and even that is also giving a 404 not found error.
404: NOT_FOUNDCode: NOT_FOUNDID: dev1::d19vo-1750264515439-31b74dc9148c