Fix Deployment Failures with Bolt.new
Bolt runs code in-browser, helping you iterate on build issues before deploying.
About This Problem
AI-generated code often works locally but fails during deployment. Common issues include missing environment variables, incorrect build configurations, incompatible dependencies, and misconfigured hosting platforms.
Common Symptoms
- Build succeeds locally but fails on Vercel/Netlify/Cloudflare
- Missing environment variables causing runtime errors
- TypeScript errors only appearing during production build
- Docker/container configuration issues
- CORS errors after deployment
- Serverless function timeouts or cold start issues
DIY Fix Steps
Verify all environment variables are set in your hosting platform
Run production build locally (npm run build) before deploying
Check for Node.js version mismatches between local and hosting
Review build logs for the specific error message
Ensure all API endpoints use correct production URLs
Add proper error handling for missing env vars at startup
Other Tools for Deployment Failures
FAQ
Why does my AI-generated app fail to deploy?
AI tools develop in an environment different from production. They may hardcode localhost URLs, skip environment variable validation, use dev-only dependencies, or generate code that passes type checks loosely but fails strict builds.