"App Build Environment" option missing

I'm running ctrlx Works 1.21.1 and the "App Build Environment" option is missing.

The documentation sounds like there should be an option to add it through the installer:

https://boschrexroth.github.io/ctrlx-automation-sdk/setup_qemu_ctrlx_works.html#installation-of-the-feature-app-build-environment

But this seems to not be available neither:

Any ideas on that ? Any help is appreciated,

Manfred