Error category
Fix deployment failures in Vercel, Netlify, hosted build pipelines, environment variables, output directories, serverless functions, and release workflows.
This Deployment troubleshooting hub collects real error signatures, quick fixes, common causes, and step-by-step debugging paths for developers who need a practical answer instead of a broad overview.
50 articles in this category.
Start by matching the exact error message, then check the technology, environment, credentials, network path, and deployment context. The pages below are grouped so you can move from broad Deployment symptoms to specific root-cause families without relying on client-side search.
Fix production deployment error where notFound() triggers FUNCTION_INVOCATION_FAILED 500 error instead of serving custom 404 page in Next.js 16+ Includes evidence for Vercel / Next.js troubleshooting demand.
FUNCTION_INVOCATION_FAILED;404 — An error occurred in the Server Components render instead of rendering the custom not-found page when cacheComponents are enabled Fix Vercel deployment failure caused by Turbopack hashed symlinks resolving incorrectly in pnpm monorepo prebuilt builds Includes evidence for Vercel / Next.js troubleshooting demand.
Cannot find module 'require-in-the-middle-<hash>' — Failed to load external module require stack error in instrumentation hook during Vercel prebuilt deployment Fix Vercel deployment build failure caused by exceeding the limit of 12 Serverless Functions per deployment Includes evidence for Vercel troubleshooting demand.
No more than 12 Serverless Functions can be added to a Deployment Fix Vercel deployment build failure due to out of memory during build step Includes evidence for Vercel troubleshooting demand.
build exited with code 1 (OOM during Vite/vanilla-extract build bundle) Fix Vercel deployment failure caused by Vercel runtime resolver using require() instead of ESM path for middleware modules Includes evidence for Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED on Vercel deploy: Cannot find module — local build artifact does not reference ESM path Fix HTTP 500 MIDDLEWARE_INVOCATION_FAILED on Vercel production deployment caused by @swc/helpers module resolution failure when using Next.js 16.2.x App Router with proxy.ts middleware convention and Sentry installed Includes evidence for Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED: Cannot find module '/var/task/node_modules/@swc/helpers/esm/_interop_require_default.js' — next@16.2.x + proxy.ts + @sentry/nextjs Fix Next.js 16.2.2 standalone deployment running out of memory due to cached streamed fetches leaking arrayBuffers under load Includes evidence for Vercel / Next.js troubleshooting demand.
cached internal streamed fetches cause unbounded arrayBuffers growth and OOM Serverless function on Vercel times out during execution; developer needs to increase timeout limit, optimize function code, or configure revalidation settings Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT: function invocation exceeded maximum allowed duration Fix Vercel deployment failures caused by missing modules after package updates, often related to monorepo setups or Next.js app router migration Includes evidence for Vercel troubleshooting demand.
Error: Cannot find module '~' imported from '~' during Vercel build Fix Vercel serverless functions timing out during long-running API calls, database queries, or external service invocations Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT: Request exceeded the configured duration limit Developer getting 504 FUNCTION_INVOCATION_TIMEOUT on Vercel serverless functions, needs to optimize or extend execution time Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT — 504 error when serverless function exceeds execution time limit Debug Next.js build failure caused by empty slot directory in production builds Includes evidence for Vercel troubleshooting demand.
Empty slot directory causes error in production build Fix Vercel serverless function timeout errors causing API route failures Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT: The function timed out after 60 seconds Fix Vercel production 500 error caused by missing clientReferenceManifest in Next.js server components Includes evidence for Vercel troubleshooting demand.
Runtime 500: clientReferenceManifest undefined for server-only pages Fix Vercel Next.js 16 ISR silent failure — incomplete RSC payload in production SSG prerender Includes evidence for Vercel troubleshooting demand.
Silent incomplete RSC payload on SSG prerender with generateStaticParams + revalidate (production-only, Next.js 16 + turbopack) Fix Next.js 16 production build hanging forever during SWC compilation on Vercel deployment Includes evidence for Vercel troubleshooting demand.
next build hangs indefinitely in SWC compile phase — reproduces on every Next 16 release (16.0.0, 16.2.6, 16.3.0-canary.19) Fix Vercel deployment failure caused by vite binary permission denied during build step Includes evidence for Vercel troubleshooting demand.
sh: line 1: /vercel/path0/node_modules/.bin/vite: Permission denied — Error: Command "npm run build" exited with 126 Fix Vercel serverless function timeout deployment error blocking production Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT: The execution of the Function has timed out (exceeded 10s on Hobby plan) Fix Vercel deployment failure with MIDDLEWARE_INVOCATION_FAILED and missing @swc/helpers module in Next.js 16 middleware Includes evidence for Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED: Cannot find module '/var/task/node_modules/@swc/helpers/esm/_interop_require_default.js' Fix Vercel deployment failure in services-mode (experimentalServices) when Next.js middleware.ts is present Includes evidence for Vercel troubleshooting demand.
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