Deployment fail

Developing with Prismic
1

Hello,

We are using Prismic with Vercel and Next.js for a multi-language content and ecommerce website.
After creating dozens of pages, custom types, slices... we are facing an issue on one or our new content.

We created a new custom type, only using Prismic on-shelf items (no change in jason queries).
This custom type is used to create a content bloc and populated with actual content, then used in a "Static Slice" in a page.

After publishing this page with this specific slice x custom type, when we deploy, we endlessly have deployment error. Please see the error log below.

Could you help us ? Does this case or log rings a bell for anyone ?

Thanks in advance !

JS

Unhandled error during request: TypeError: Cannot read property '0' of undefined
    at /vercel/path0/.next/serverless/pages/[lang]/[page].js:11185:35
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async Promise.all (index 0)
    at async staticSliceResolver (/vercel/path0/.next/serverless/pages/[lang]/[page].js:11182:10)
    at async getByUID (/vercel/path0/.next/serverless/pages/[lang]/[page].js:11220:20)
    at async getStaticProps (/vercel/path0/.next/serverless/pages/[lang]/[page].js:5045:33)
    at async renderToHTML (/vercel/path0/node_modules/next/dist/next-server/server/render.js:26:109)
    at async renderReqToHTML (/vercel/path0/.next/serverless/pages/[lang]/[page].js:24640:22)
    at async Object.exportPage [as default] (/vercel/path0/node_modules/next/dist/export/worker.js:12:92)
Error occurred prerendering page "/fr-fr/angell-test1". Read more: https://err.sh/next.js/prerender-error
TypeError: Cannot read property '0' of undefined
    at /vercel/path0/.next/serverless/pages/[lang]/[page].js:11185:35
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async Promise.all (index 0)
    at async staticSliceResolver (/vercel/path0/.next/serverless/pages/[lang]/[page].js:11182:10)
    at async getByUID (/vercel/path0/.next/serverless/pages/[lang]/[page].js:11220:20)
    at async getStaticProps (/vercel/path0/.next/serverless/pages/[lang]/[page].js:5045:33)
    at async renderToHTML (/vercel/path0/node_modules/next/dist/next-server/server/render.js:26:109)
    at async renderReqToHTML (/vercel/path0/.next/serverless/pages/[lang]/[page].js:24640:22)
    at async Object.exportPage [as default] (/vercel/path0/node_modules/next/dist/export/worker.js:12:92)
2

Hello @jsprunet. Thanks for reaching out.

This: Cannot read property '0' of undefined seems to be a JavaScript-related error. Can you check if you're correctly verifying the values of your array methods?

Here's a related thread I found online