I'm running an nx monorepo, I haven't overridden any setting as recommended here: https://github.com/vercel/vercel/blob/main/errors/now-next-routes-manifest.md
yet I still get:

[23:49:51.202]  NX   Successfully ran target build for project test-app
[23:49:51.203] 
[23:49:51.203] 
[23:49:51.255] View logs and investigate cache misses at https://cloud.nx.app/runs/A5s8qBQ9FD
[23:49:51.256] 
[23:49:51.310] Error: The file "/vercel/path0/apps/test-app/.next/routes-manifest.json" couldn't be found. This is often caused by a misconfiguration in your project.
[23:49:51.310] Learn More: https://err.sh/vercel/vercel/now-next-routes-manifest
[23:49:52.492] 
[23:49:55.273] Exiting build container

Any idea why?