It could be that your build is crashing because your next.config.ts (or next.config.js) is trying to process a URL that doesn't exist, likely because an environment variable is missing in your Vercel project settings.

The specific error TypeError: Invalid URL with input: 'undefined' usually happens when you use the new URL() constructor or a library that requires a valid string, but it's receiving undefined instead.

Most likely cause & solution

• Go to your project on Vercel > Settings > Environment variables
• Add any required environment variables that you’re using locally but forgot to define on Vercel

example:

• NEXT_PUBLIC_R2_PUBLIC_URL
• R2_BUCKET_NAME
• R2_ACCESS_KEY_ID
• R2_ENDPOINT

Tip: You can also redeploy by clicking the Redeploy button again after making these changes.

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Other possible causes

• Images Remote Patterns: You are likely setting up Cloudflare R2 or Payload CMS media URLs.
• Redirects or Rewrites: Hardcoding a base URL for an API or the CMS.
• Experimental Features: Specifically mTLS or proxy settings related to pgBouncer.

Possible solutions

• Check your Environment Variables
• Add a Fallback in next.config.ts