Failed to collect page data

Used in this guide:
Next.js 15.3.4

Error:

ERROR: Failed to collect page data


Error:

Invalid URL


Error:

(input: 'undefined')


If you’re getting all of the above errors in Vercel log, it means means some code is constructing a URL from an env var that’s missing in the Vercel build env. So make sure to check all environment variables.

JKT

Stay focused, and the rest will follow

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