Deployed my turborepo app but getting a 500 error, This Serverless Function has crashed

I’ve just deployed my Fastify server for my Turborepo application and i get a 500 error .

The build completes successfully, but when I try to access my domain online, I get a 500 error This Serverless Function has crashed.

I created an npm run start:server command at the root of the project to start my server from the /dist directory.

Could someone help me?

The repo: GitHub - SpinBoxx/turborepo-boilerplate