Training frontend installation issue.

I'm following Plone 6 training currently at chapter 5 Frontend installation: (5. Installation – Mastering Plone 6 development — Plone Training 2025 documentation)` While running make install it says find: core/packages/registry/src: No such file or directory
find: core/packages/components/src: No such file or directory can someone help me with this?

During installation (make install), the core directory is created.
It then contains the Volto packages.