Error When Deploy

[pawlean (Pauline P. Narvas)]

Hi, @yuusukealmal! Welcome to the Vercel Community

Could you go through this post? 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…