Vercel serverless functions timing out with zero bytes returned after deployment

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Problem

All serverless functions time out with zero bytes returned. Static assets work fine. Even a zero-dependency ping function hangs. The issue persists across two separate projects on the same account.

Current Behavior

  • Serverless functions hang until timeout.
  • Zero bytes are returned to the client.
  • Static assets are served correctly.
  • The issue occurs in production but works correctly in the local environment.

Context

All was working as expected on 3/28 when I last deployed under commit multiplier-dcau573xf-sbullocks-projects.vercel.app.

As of today, 3/29, I made some changes to my repository (rate limiting), committed and deployed to Vercel. I updated my env variables but keep getting hanging API calls. Both my /github and /claude calls are hanging until timeout.

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