Every v0 problem. Every fix.
The 5 ways a v0 app breaks once you leave the preview, with step-by-step fixes and fixed-price rescue when you’re out of time.
By Hyder ShahFounder · Afterbuild LabsLast updated 2026-04-18
v0 is frontend-only. Every real app needs a backend, auth, a domain, and error handling it doesn’t generate. Missing backend, broken OAuth, and custom-domain 404s cover almost every broken v0 deploy we triage. Below: the 5 problem pages we wrote to fix each pattern. Out of time? book a free 30-min diagnostic.
- Diagnosisv0 app broken after export or deploy? 5 causes
Blank screens, missing routes, OAuth loops, env var misses, and server errors. 90% of broken v0 apps fail on one of five things.
Read the fix → - LaunchTurn your v0 prototype into a production app
Backend, database, auth, payments, env, monitoring, custom domain. The full checklist v0 hands you to finish yourself.
Read the fix → - Backendv0 has no backend — how to add Supabase/API properly
Wire Supabase or Neon + Drizzle to v0 output. Server actions, route handlers, schema, and no client-side secrets.
Read the fix → - Authv0 auth breaks in production?
Google OAuth loops, Supabase sessions that don't persist, and NextAuth redirects pointing at localhost. Fix all three.
Read the fix → - DomainAdd a custom domain to a v0 app without 404s
DNS, Vercel project settings, apex vs www, trailing-slash gotchas. Why your v0 app returns 404 on the real domain.
Read the fix →