I have installed Vercel CLI to test a serverless function locally.
The repository is this: https://github.com/LuigiImVector/github-badge/tree/eda8e1954fc81d69142c461b89f32e9f7635f6f2
With vercel dev
I started the localhost server but there is a problem. The homepage (index.html
) is loaded correctly but when I go to http://localhost:3000/api
or http://localhost:3000/api/index.js
an error appears.
The entire error message that appears in the console is this:
Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]: Only file and data URLs are supported by the default ESM loader. On Windows, absolute paths must be valid file:// URLs. Received protocol 'c:' at Loader.defaultResolve [as _resolve] (internal/modules/esm/resolve.js:782:11) at Loader.resolve (internal/modules/esm/loader.js:88:40) at Loader.getModuleJob (internal/modules/esm/loader.js:241:28) at Loader.import (internal/modules/esm/loader.js:176:28) at importModuleDynamically (internal/modules/cjs/loader.js:1011:27) at exports.importModuleDynamicallyCallback (internal/process/esm_loader.js:30:14) at getListener (C:UsersluigiAppDataRoamingnpmnode_modulesvercelnode_modules@vercelnodedistlauncher.js:66:24) at C:UsersluigiAppDataRoamingnpmnode_modulesvercelnode_modules@vercelnodedistlauncher.js:77:5 at main (C:UsersluigiAppDataRoamingnpmnode_modulesvercelnode_modules@vercelnodedistdev-server.js:103:14) at processTicksAndRejections (internal/process/task_queues.js:95:5) { code: 'ERR_UNSUPPORTED_ESM_URL_SCHEME' } Error! Failed to complete request to /api/index.js: Error: read ECONNRESET
In the site on Vercel everything works perfectly (https://github-badge-three.vercel.app/api?years=9) but in localhost does not.
Advertisement
Answer
Update Vercel CLI: npm install -g vercel
(if this doesn’t work try npm install -g vercel@canary
)