Fix Library ? Vercel + Prisma
Vercel + Prisma troubleshooting

Fix Prisma Client Did Not Initialize on Vercel

Run prisma generate during the build and confirm DATABASE_URL exists in Vercel Production variables. This error is usually a build/runtime mismatch, not a Vercel outage.

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Common symptoms

  • Build succeeds but API routes crash when using Prisma.
  • Logs mention @prisma/client did not initialize.
  • Local development works but production fails.

What to check first

Platform: Vercel + Prisma
Error: Prisma Client did not initialize

Run prisma generate during the build and confirm DATABASE_URL exists in Vercel Production variables. This error is usually a build/runtime mismatch, not a Vercel outage.

Step-by-step fix

  1. Add postinstall or build step that runs prisma generate.
  2. Confirm DATABASE_URL is set for Production and Preview in Vercel.
  3. Check that schema.prisma is committed and available during build.
  4. Redeploy after clearing stale build output if needed.
"scripts": {
  "postinstall": "prisma generate",
  "build": "prisma generate && next build"
}

Common mistake to avoid

Do not commit generated node_modules output. Generate Prisma during install/build.

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