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Fix Vercel deployment failure in services-mode (experimentalServices) when Next.js middleware.ts is present Includes evidence for Vercel troubleshooting demand.
An unexpected error occurred when running this build. This may be a transient issue, please try rebuilding your project. Fix Next.js proxy.ts route handler not running in production deployment behind Cloudflare reverse proxy Includes evidence for Vercel troubleshooting demand.
proxy.ts does not execute in production when behind Cloudflare Proxy (middleware.ts works fine) Fix Vercel deployment failure MIDDLEWARE_INVOCATION_FAILED with Next.js 16 and @swc/helpers module not found Includes evidence for Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED — Cannot find module '@swc/helpers/esm/_interop_require_default.js' Fix Vercel CLI env add storing empty value despite reporting success Includes evidence for Vercel troubleshooting demand.
vercel env add NAME --value <v> reports success but stores empty string Fix Vercel dev server missing Host header validation that allows DNS-rebinding attacks on local development environments Includes evidence for Vercel troubleshooting demand.
vercel dev missing Host/Origin validation — DNS-rebinding attack vector Fix Vercel deployment failure with MIDDLEWARE_INVOCATION_FAILED error related to missing @swc/helpers module in Next.js 16 middleware Includes evidence for Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED on Vercel deploy: Cannot find module '@swc/helpers/esm/_interop_require_default.js' — minimal repro: next@16.2.6 + proxy.ts + top-level @sentry/nextjs import Fix Vercel @vercel/node res.status res.json not a function error in new Rust runtime Includes evidence for Vercel troubleshooting demand.
VercelResponse type declares res.status() res.json() absent in Rust runtime Fix Vercel env add storing empty value instead of provided --value Includes evidence for Vercel troubleshooting demand.
vercel env add --value silently stored as empty string fix Vercel MIDDLEWARE_INVOCATION_FAILED cannot find module @swc/helpers Includes evidence for Next.js / Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED: Cannot find module @swc/helpers/esm/_interop_require_default.js Fix Netlify CLI infinite 'terminated unexpectedly' error loop during ntl dev Includes evidence for Netlify troubleshooting demand.
Netlify CLI 'Error: Netlify CLI has terminated unexpectedly' — infinite error loop after ntl dev Fix Vercel CLI env add storing empty values instead of provided --value Includes evidence for Vercel troubleshooting demand.
vercel env add --value <value> --sensitive --yes silently stores empty string Fix Next.js router state header parse error during version upgrades or rolling deployments Includes evidence for Next.js troubleshooting demand.
The router state header was sent but could not be parsed Fix Turbopack consuming 40+ GB RAM and crashing due to incorrect workspace root detection Includes evidence for Next.js troubleshooting demand.
Next.js Turbopack misdetected workspace root causes RAM exhaustion (40+ GB) and process crash Fix Vercel deployment failure with middleware invocation error and missing @swc/helpers module Includes evidence for Next.js / Vercel troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED + FUNCTION_INVOCATION_FAILED on Vercel deploy: Cannot find module @swc/helpers/esm/_interop_require_default.js Fix Turbopack build chunks being blocked by Cloudflare WAF with 403 Includes evidence for Next.js troubleshooting demand.
Turbopack production build generates chunk filenames with multiple dots that trigger WAF 403 responses Fix Vercel deployment failure MIDDLEWARE_INVOCATION_FAILED missing @swc/helpers Includes evidence for Next.js troubleshooting demand.
MIDDLEWARE_INVOCATION_FAILED: Cannot find module @swc/helpers/esm/_interop_require_default.js Fix NextAuth PrismaAdapter linkAccount() hanging indefinitely on Vercel serverless functions Includes evidence for Vercel troubleshooting demand.
NextAuth PrismaAdapter linkAccount() hangs indefinitely on Vercel — Account INSERT never completes Fix Vercel build failure with vite Permission denied error when deploying Vite + React projects Includes evidence for Vercel troubleshooting demand.
sh: line 1: /vercel/path0/node_modules/.bin/vite: Permission denied (exit code 126) Fix Netlify deployment showing success but site returning 404 because only partial files uploaded Includes evidence for Netlify troubleshooting demand.
Netlify deploys succeed but only 2 files uploaded — live site returns 404 on all routes Fix Vercel deploy error 'An unexpected error occurred when running this build' with middleware Includes evidence for Vercel / Next.js troubleshooting demand.
Vercel deploy fails with 'An unexpected error occurred when running this build' with middleware + experimentalServices