Cannot generate Intel Avalon-MM Intel Stratix 10 Hard IP+ for PCI Express design example on Quartus Prime Pro 19.4.

Thanks. there are few experiment that I am suggesting.

1. Generate the same IP using other version.
2. With your current project with 19.4, try to generate other IP's example design (maybe external memory or any IP that you familiar).
3. If you have other PC, try to install the same 19.4 quartus version again and generate the same example design.

With this, we might have some clue where the problem come from.