Hey,
I’m new to React and while trying to build my Website on Vercel I ran into this error. When i run the build locally via “npm run dev &” it works and i can see my build on localhost:3000. When I try it on Vercel get the following Error Message. I also tried to build it locally with “vercel build” and I get the same result.
[13:31:00.202] Running build in Washington, D.C., USA (East) – iad1
[13:31:00.327] Cloning github.com/ArwinJa/DMWT (Branch: main, Commit: a23cace)
[13:31:00.343] Skipping build cache, deployment was triggered without cache.
[13:31:00.672] Cloning completed: 343.895ms
[13:31:00.936] Running "vercel build"
[13:31:02.372] Vercel CLI 39.2.0
[13:31:02.748] Warning: Detected "engines": { "node": ">=18" } in your `package.json` that will automatically upgrade when a new major Node.js Version is released. Learn More: http://vercel.link/node-version
[13:31:02.756] Installing dependencies...
[13:31:10.315]
[13:31:10.315] added 40 packages in 7s
[13:31:10.316]
[13:31:10.316] 8 packages are looking for funding
[13:31:10.316] run `npm fund` for details
[13:31:10.334] Detected Next.js version: 15.1.0
[13:31:10.337] Running "npm run build"
[13:31:10.471]
[13:31:10.471] > build
[13:31:10.471] > next build
[13:31:10.471]
[13:31:11.149] Attention: Next.js now collects completely anonymous telemetry regarding usage.
[13:31:11.149] This information is used to shape Next.js' roadmap and prioritize features.
[13:31:11.149] You can learn more, including how to opt-out if you'd not like to participate in this anonymous program, by visiting the following URL:
[13:31:11.150] https://nextjs.org/telemetry
[13:31:11.150]
[13:31:11.263] ▲ Next.js 15.1.0
[13:31:11.263]
[13:31:11.265] Linting and checking validity of types ...
[13:31:11.366] Creating an optimized production build ...
[13:31:15.696] (node:255) [DEP_WEBPACK_MODULE_ISSUER] DeprecationWarning: Module.issuer: Use new ModuleGraph API
[13:31:15.696] (Use `node --trace-deprecation ...` to show where the warning was created)
[13:31:17.416] Failed to compile.
[13:31:17.416]
[13:31:17.416] ./styles/global.css
[13:31:17.417] Global CSS cannot be imported from files other than your Custom <App>. Due to the Global nature of stylesheets, and to avoid conflicts, Please move all first-party global CSS imports to pages/_app.js. Or convert the import to Component-Level CSS (CSS Modules).
[13:31:17.417] Read more: https://nextjs.org/docs/messages/css-global
[13:31:17.417] Location: pages/App.js
[13:31:17.417]
[13:31:17.417] Import trace for requested module:
[13:31:17.417] ./styles/global.css
[13:31:17.417]
[13:31:17.417] ./styles/global.css
[13:31:17.417] Module build failed: Error: Final loader (./node_modules/next/dist/build/webpack/loaders/error-loader.js) didn't return a Buffer or String
[13:31:17.417] at processResult (/vercel/path0/node_modules/next/dist/compiled/webpack/bundle5.js:28:405934)
[13:31:17.417] at /vercel/path0/node_modules/next/dist/compiled/webpack/bundle5.js:28:407465
[13:31:17.418] at /vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:8727
[13:31:17.418] at iterateNormalLoaders (/vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:5565)
[13:31:17.418] at iterateNormalLoaders (/vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:5650)
[13:31:17.418] at /vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:5879
[13:31:17.418] at runSyncOrAsync (/vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:4185)
[13:31:17.418] at iterateNormalLoaders (/vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:5782)
[13:31:17.418] at /vercel/path0/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:5426
[13:31:17.418] at /vercel/path0/node_modules/next/dist/compiled/webpack/bundle5.js:28:406955
[13:31:17.418]
[13:31:17.418] Import trace for requested module:
[13:31:17.418] ./styles/global.css
[13:31:17.418]
[13:31:17.428]
[13:31:17.428] > Build failed because of webpack errors
[13:31:17.451] Error: Command "npm run build" exited with 1
[13:31:17.617]