Help: Vercel deployment failing with "document is not defined" error for Deepgram Voice Agent Demo

[btconway]

Hi! I'm trying to deploy the Deepgram Voice Agent Demo (https://github.com/deepgram-devs/deepgram-voice-agent-demo) on Vercel but running into build errors during deployment.

The build fails with:

ReferenceError: document is not defined
at createTag (/vercel/path0/.next/server/chunks/567.js:1:8756)

Details:

• Using Next.js version 14.2.18
• Following the README setup instructions
• Created the necessary .env file with DEEPGRAM_API_KEY
• Local development with yarn dev works fine
• The error occurs during Vercel's static page generation for "/" and "/_not-found" routes
• Build compiles successfully but fails during static export

I'm not a frontend developer, so I'd appreciate help understanding what might be causing this error. From what I've read, it seems related to trying to access the browser's document object during server-side rendering - is there a configuration I need to adjust for Vercel deployment?

Full build log attached below for reference.

vercel_build_log.txt

[deepgram-community[bot]]

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[deepgram-community[bot]]

Hey there! It looks like you haven't connected your GitHub account to your Deepgram account. You can do this at https://community.deepgram.com - being verified through this process will allow our team to help you in a much more streamlined fashion.

[deepgram-community[bot]]

It looks like we're missing some important information to help debug your issue. Would you mind providing us with the following details in a reply?

• The deepgram product you are using (e.g Speech to Text, Agent API)
• A request ID that triggered your error or issue.

[btconway]

• Deepgram Voice Agent