Cloud function can't reference hosted files

This file is being treated as an ES module because it has a '.js' file extension and '/usr/local/server/src/function/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
    at file:///usr/local/server/src/function/src/main.js:4:22
    at ModuleJob.run (node:internal/modules/esm/module_job:198:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:385:24)
    at async importModuleDynamicallyWrapper (node:internal/vm/module:437:15)
    at async execute (/usr/local/server/src/server.js:178:24)
    at async action (/usr/local/server/src/server.js:225:7)
    at async /usr/local/server/src/server.js:14:5