Next.js 15 RC with Experimental Partial Prerendering does not work with contentlayer2

[tonyabracadabra]

TypeError: Cannot read properties of undefined (reading 'split') after configuring ppr experimental feature in nextjs 15

A simple example created by @timlrx - https://stackblitz.com/edit/github-ekmxur-ba82kk?file=next.config.js,package.json,tsconfig.json

Related issue on contentlayer2 timlrx/contentlayer2#33