high90%
Turbopack 16.3: nft.json drops store target files for an ESM serverExternalPackage reached via a 'use client' component in a shared SSR-layer chunk → dangling alias → ERR_MODULE_NOT_FOUND on Vercel
In Next.js 16.3 with Turbopack, when an externalized server package is referenced only from a shared SSR-layer chunk (generated for 'use client' components), routes that do not import the package can have the package's content-hashed alias symlink in their .nft.json but not the corresponding store target files. This causes Vercel to pack a dangling symlink, leading to ERR_MODULE_NOT_FOUND and HTTP 500 on affected routes.