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.
133 crawlable articles in this category. 79 additional records are indexed in JSON only (no standalone HTML route).
Browse Deployment records in the data catalog — search JSON index entries, including data-only records without standalone HTML guides.
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.
Evidence labels are derived at build time from each Markdown record. Source-backed entries have public URLs under a Sources checked section, while partial-source entries expose public links without a complete source block.
These entries include public source URLs in the imported page body. Use them first when you need evidence for provider behavior, SDK regressions, or version-specific failures.
Fix Vercel deployment build failures caused by environment drift (Node version mismatch, missing build-time env vars like NEXT_PUBLIC_*), TypeScript stricter compilation, or OOM conditions Includes evidence for Vercel troubleshooting demand.
Cannot find module OR "Module not found" OR Process completed with exit code 1 OR Vercel build failed despite local npm run build being green Fix Next.js/Vercel deploy module not found errors caused by case sensitivity differences between local Windows/macOS filesystem and Vercel's Linux build environment Includes evidence for Vercel troubleshooting demand.
Module not found: Can't resolve '@/components/forms/RegisterForm' — Build successful locally but fails on Vercel deployment Next.js project builds successfully locally on Windows/macOS but fails on Vercel with case-sensitive module import errors; needs cross-platform fix. Includes evidence for Vercel troubleshooting demand.
Module not found: Can't resolve '@/components/forms/RegisterForm' — Error: Command "npm run build" exited with 1 Next.js app builds successfully on developer's machine (Windows/macOS) but fails on Vercel deploy with case-sensitivity module not found errors. File paths look correct but Vercel's Linux filesystem is case-sensitive. Includes evidence for Vercel troubleshooting demand.
ModuleNotFoundError: Module not found: Can't resolve '@/components/forms/RegisterForm' | Build failed because of webpack errors Next.js project builds locally and deploys to Vercel Serverless Functions fine, but fails in Edge Runtime/Middleware because @clerk/nextjs and similar packages use full Node.js APIs that are unavailable in V8 isolate edge environment Includes evidence for Vercel troubleshooting demand.
A Node.js API is used (process.cwd) at line X which is not supported in the Edge Runtime Resolve Vercel build crashes caused by excessive node_modules/cache size consuming build container 8GB RAM — needs cache clearing, NODE_OPTIONS tuning, or on-demand enhanced builds Includes evidence for Vercel troubleshooting demand.
At least one "Out of Memory" ("OOM") event was detected during the build. Process terminated with SIGKILL signal. Fix monorepo deployment failures where Vercel/Turborepo cannot resolve internal workspace packages (e.g., @repo/ui), requiring manual rebuild every time Includes evidence for Vercel troubleshooting demand.
Internal packages not found — build always fails until manually rebuilt while disabling cache Fix Vercel deployment module resolution failures where local builds succeed but cloud build cannot resolve paths Includes evidence for Vercel troubleshooting demand.
Module not found: Can't resolve [module] — works locally but fails on Vercel deployment, often related to path aliases in tsconfig.json Fix Next.js module resolution errors during Vercel production deployments related to turbopack and CommonJS package imports Includes evidence for Vercel troubleshooting demand.
Module not found error in Next.js turbopack builds on Vercel when importing CommonJS packages; works locally but fails in Vercel deployment Resolve CI/CD pipeline deployment failures triggered by Vercel CLI version upgrades blocking automated Next.js builds Includes evidence for Vercel troubleshooting demand.
Pipeline started failing on Vercel CLI version update for manual build and deployments Fix Vercel preview deployment returning 403 forbidden despite successful build — check preview settings, team/org permissions, domain restrictions, and environment variable exposure Includes evidence for Vercel troubleshooting demand.
403 Error in Preview Panel even though site is working Developer deploying Next.js with Turbopack encounters 403 behind reverse proxy/WAF due to generated chunk filenames Includes evidence for Vercel troubleshooting demand.
Turbopack production build generates chunk filenames with multiple dots that trigger WAF 403 responses Fix internal placeholder param %%drp:slugs:...%% leaking as catch-all segment params during Next.js production build with Cache Components + Parallel Routes, causing prerender failure Includes evidence for Vercel troubleshooting demand.
Received slug: %%drp:slugs:9ca6cb0ae51f1%% TypeError: c.join is not a function Reduce Python function cold start latency on Vercel Serverless Functions — remove unused files from deployment bundle to improve invocation speed Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT or slow cold start on Vercel Python functions due to unnecessary files in bundle (uv installer metadata, unused vendor files) Resolve Vercel deployment build failures caused by stricter TypeScript type checking compared to local tsc/tsup builds Includes evidence for Vercel troubleshooting demand.
vercel build TypeScript errors: Property 'body' does not exist on type 'Response' — vercel build produces TS errors even when tsc/tsup succeed locally Fix blocked deployment when Vercel marks project/team as blocked due to fair use violation; restore ability to deploy Includes evidence for Vercel troubleshooting demand.
Blocked scope returns HTTP 451 error; user receives "Team access required to deploy." message with manual approval gate Fix invalid route source pattern error in vercel.json where negative lookahead regex `(?!pattern)` doesn't work — must use `((?!pattern).*)` syntax with path-to-regexp Includes evidence for Vercel troubleshooting demand.
Invalid route source pattern — path-to-regexp syntax vs RegExp confusion for negative lookaheads in vercel.json Fix Next.js notFound() prerender causing broken page hydration and flight data holes with cacheComponents enabled Includes evidence for Vercel troubleshooting demand.
notFound() prerender leaves holes in Flight data that never resolve resulting in reported hydration errors Fix Next.js route cache serving stale data when navigating between URLs with different repeated search params like color=red&color=green vs color=red&color=blue Includes evidence for Vercel troubleshooting demand.
client-side cache key collision for repeated search param keys results in stale render, Suspense never re-suspends Fix Vercel build failure caused by environment variable size exceeding the 4KB hard limit for serverless functions Includes evidence for Vercel troubleshooting demand.
Build Failed — The Environment Variables provided for your Serverless Functions exceed the limit of 4KB Continue through the full static archive for this hub. Every listed page is crawlable and keeps its existing canonical URL.