After more than a week of trying every day to solve the installation issue in Native Access, I was finally able to resolve it today—but by applying the approach used to solve a different problem, which is described in this article: https://support.native-instruments.com/hc/en-us/articles/5259695604625-Native-Access-Error-Please-grant-permission-to-NTK-Daemon-to-install-dependencies
You should follow all the steps listed here, restart your Mac, then right-click to run Native Access (to open it with administrator privileges), and finally, this whole headache—which has taken me dozens of hours to resolve—is solved