5 Deployment Errors That Break Every Vibe Coded App

You built something with an AI coding tool. It works perfectly in the preview. You hit deploy and... nothing. Or worse, some cryptic error you've never seen before.

I've watched this exact scenario play out hundreds of times. And it's almost always one of five things.

1. The Missing Environment Variable

This is the number one killer. AI coding tools set up preview environments with sensible defaults. But once you deploy, those defaults disappear. Your database URL? Gone. Your API key? Never made it to production.

The fix is boring but important. Check every single environment variable your app references. Then check them again. Most platforms don't surface missing env vars cleanly, so you might get a generic "build failed" when the real issue is a missing database connection string.

2. The Package Version Conflict

AI tools pick package versions for you. Most of the time that's fine. But every few weeks, some package pushes a breaking update and the tool grabs it automatically.

The telltale sign? Your app worked yesterday, you changed nothing, and now it's broken. Look at your package.json. Find any package without a pinned version. That's probably your problem.

Pin your versions. Seriously. Future you will thank present you.

3. The Build Timeout

Most hosting platforms give you a limited window to build. If your app has a ton of dependencies or does heavy stuff at build time (like fetching data from an API during static generation), you'll hit the wall.

I saw someone try to pre-render 2,000 product pages at build time. Timed out every single time. The fix was switching to dynamic rendering for anything over 50 pages. Not pretty, but it ships.

4. The CORS Disaster

Your app calls an external API. Works in dev because browsers are lenient with localhost. Deploy it and suddenly every fetch request fails with a CORS error.

This isn't specific to any tool. It's an "every web app" problem. But AI coding tools make it easy to forget about because the preview environment is so smooth.

You need your API to return the right headers, or you need a proxy. Either use a serverless function as middleware or pick an API that handles CORS properly.

5. The Database Migration That Never Ran

You added a new column to your database locally. Pushed code that references it. Deployed. Boom, everything crashes because production still has the old schema.

Migrations don't run themselves. And AI coding tools don't manage your database schema for you. You have to push those changes to your production database manually before deploying.

When You're Still Stuck

Look, sometimes the bug isn't on this list. Sometimes it's something genuinely weird and you've been staring at it for three hours.

That's exactly why we built VibeFix. Post your bug as a bounty, and a developer who's probably seen your exact error before will fix it. Most deployment issues get resolved within hours.

Stop banging your head against the wall. Post a bounty and get back to building.