Sanity deployment to Vercel failing with multiple errors

Hey there! Congrats on getting started with Sanity – glad you're enjoying it so far! 🎉

I totally understand the frustration with Vercel deployment errors. The tutorial you're following is a solid one, but it was written back in 2023, and there have been some important updates to both Next.js and Sanity since then that could be causing issues.

Without seeing your specific errors, here are the most common issues people run into when deploying that tutorial to Vercel:

Most Common Issues:

1. Environment Variables Missing Vercel needs your Sanity project configuration. Make sure you've added these environment variables in your Vercel project settings:

• NEXT_PUBLIC_SANITY_PROJECT_ID
• NEXT_PUBLIC_SANITY_DATASET

You can find these values in your studio/sanity.config.ts file. In Vercel, go to your project → Settings → Environment Variables and add them there.

2. Node.js Version The tutorial uses older versions of Next.js and dependencies. Sanity Studio v3+ requires Node.js 20+, so make sure your Vercel deployment is using Node 20 or higher. You can set this in your package.json:

"engines": {
  "node": ">=20.0.0"
}

3. Build Command Issues Make sure your Vercel project is pointing to the correct directory. If you followed the tutorial's monorepo structure, Vercel needs to know to build from the frontend folder. In your Vercel project settings, set the Root Directory to frontend.

4. CORS Configuration Once you get the build working, you'll need to add your Vercel deployment URL to Sanity's CORS settings. The tutorial mentions this for localhost, but you'll need to add your production URL too (like https://your-project.vercel.app).

5. Outdated Dependencies The tutorial uses @sanity/client which has been updated. Consider using next-sanity instead – it's the official all-in-one toolkit that handles a lot of the configuration automatically and works better with modern Next.js features.

6. TypeScript Configuration If you're using TypeScript (which the tutorial does), make sure your tsconfig.json is properly configured and all type dependencies are installed.

What to do next:

1. Share your errors! Reply with the specific error messages from your Vercel build logs – that'll help us pinpoint exactly what's going wrong
2. Check your package versions – compare what you have vs what the tutorial shows
3. Consider the modern approach – If you're just getting started, you might want to check out the official Sanity + Next.js learning course which uses more up-to-date patterns with the next-sanity toolkit

Drop those error messages here and we'll get you sorted! 💪