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v0 app broken after export or deploy? 5 common causes (2026)

v0 app broken after export or deploy? 5 common causes (2026)

Last updated 15 April 2026 · 9 min read · By Hyder Shah
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Direct answer

Scope of this page: v0-specific failures (frontend-only, export gaps, no backend). For tool-agnostic error-signature fixes see the /fix/ pages. Shopping for a paid rescue? Fix my AI app.

v0 is frontend-only. When it breaks in production it’s almost always one of five things: no backend wired, Google OAuth redirect pointing at the v0 preview (deep dive), an export that pulled only one route, missing env vars on Vercel (deep dive), or an unhandled server-side error (deep dive). Match the console error to the table, then follow the matching step below.

Quick fix for v0 app broken after export or

Start here

Step 1 — Fix a broken export (blank screen)

v0 exports a single route at a time. If your app shows a blank screen on Vercel, check app/layout.tsx, app/page.tsx, and any dynamic route folders (e.g. app/dashboard/page.tsx) made it into the repo. Re-export missing routes, commit, redeploy. Hard-refresh.

Deeper fixes when the quick fix fails

  1. 02

    Step 2 — Fix the OAuth redirect (login loop)

    In Google Cloud Console → Credentials → OAuth 2.0 Client, add your production origin (https://yourapp.com) and callback (https://yourapp.com/api/auth/callback/google) to Authorized redirect URIs. In Supabase or NextAuth, set Site URL to the same origin. Redeploy and test in incognito.

  2. 03

    Step 3 — Wire a real backend

    v0 has none. Add Supabase (Postgres + auth + storage) or Neon + Drizzle. Put the client in a server component, keep the service-role key server-only, and expose data via server actions or route handlers at app/api/*. Never ship the anon key in a client bundle that mutates data.

  3. 04

    Step 4 — Propagate env vars to Vercel

    In Vercel → Project Settings → Environment Variables, add every key your local .env.local contains with production values. Common missing keys: NEXT_PUBLIC_SUPABASE_URL, SUPABASE_SERVICE_ROLE_KEY, STRIPE_SECRET_KEY, GOOGLE_CLIENT_SECRET. Redeploy so the build picks them up.

  4. 05

    Step 5 — Add server-side error handling

    Every API route and server action needs a try/catch, input validation (Zod), and a rate limit on writes. Wrap the handler, return a structured error, and log to Vercel logs or Sentry. One 500 without a boundary takes down the whole page.

Why AI-built apps hit v0 app broken after export or

v0 generates React UI. It does not generate a backend, a database, or production auth. Its preview environment hides the gap by stubbing data; your Vercel deploy doesn’t.

Industry benchmarks put AI-code vulnerability rates close to half (see our 2026 research). Most of those flaws surface the moment you cross the preview boundary — a broken login, a 500 from an API route, or a blank screen.

“Code works in isolation but fails in actual deployment contexts.”
Vibe coding review, 2026

Diagnose v0 app broken after export or by failure mode

Open DevTools → Console and match your error to a row.

SymptomRoot causeFix section
Blank page on Vercel, no errorsExport pulled only one route or layout missingStep 1
Login redirects back to /login foreverOAuth redirect URI mismatchedStep 2
Data never loads, fetch failsNo backend wired — Supabase/API missingStep 3
Works locally, fails on VercelEnv vars not set in Vercel projectStep 4
500 error on an API routeNo try/catch or input validation generatedStep 5

Related errors we fix

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Five patterns cover almost every broken v0 app. If yours is the odd one out, we’ll find it.

  • →Stuck for more than 4 hours
  • →Paying users affected right now
  • →Tried two fixes, broke a third thing
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v0 app broken after export or questions

Why does my v0 app work locally but is broken on Vercel?+
Usually env vars. v0 generates code that reads NEXT_PUBLIC_* and server secrets from process.env. Locally, .env.local fills them; on Vercel, nothing does until you set them in Project Settings → Environment Variables. After adding them, trigger a fresh deploy so the build picks them up. If it still breaks, check the OAuth redirect URIs next.
My v0 export shows a blank screen. How do I fix it?+
v0 exports one route at a time. A blank screen usually means app/layout.tsx, a nested layout, or a dynamic route did not make it into your repo. Compare your v0 project structure to app/ in your repo and re-export anything missing. Commit, push, redeploy. Hard-refresh to avoid cached chunks.
Why does Google login break when I deploy my v0 app?+
v0's OAuth is wired against the preview URL. On deploy, the redirect URI no longer matches. In Google Cloud Console add your production origin and callback to Authorized redirect URIs, then update Supabase or NextAuth Site URL to the production domain. Test in an incognito window to avoid cached sessions lying to you.
Can I fix a broken v0 app myself?+
Yes, ~80% of the time. The five failure modes above each take 5–15 minutes with the instructions above. If your app fails in ways that do not match any row — CORS, middleware redirect loops, or edge runtime errors — the debugging gets harder fast and a paid triage usually saves hours.
How much does it cost to hire someone to fix a broken v0 app?+
Our Emergency Triage is $299 fixed price with 48-hour turnaround for a single bug. A full Deploy-to-Production Pass — backend, auth, env, CI/CD, monitoring, rollback, custom domain — is $1,999 with a 7-day turnaround. Finishing an entire v0 MVP end-to-end is $7,499. No hourly surprises.
Is it worth rescuing a v0 prototype or should I rewrite?+
Rescue if the UI is good and the gap is infrastructure — backend, auth, env, domain. Rewrite only if the data model doesn't match the UI or you want off React/Next.js entirely. v0 output is generally clean React, so we almost always rescue. We offer a free 30-minute diagnostic to help you decide.
Next step

Ship the fix. Keep the fix.

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About the author

Hyder Shah leads Afterbuild Labs, shipping production rescues for apps built in Lovable, Bolt.new, Cursor, Replit, v0, and Base44. our rescue methodology.

v0 app broken after export or experts

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