The error message is generic. While DX errors are often regarding missing or corrupted DX files. There are several other
issues that can lead to DX errors, and not using a graphics processor that is capable of running a game, even if it is
DX12 'capable', is one of them.
This game has quite a high minimum graphics processor requirement - Nvidia RTX 2060 \ AMD 5600 XT.
You Intel Iris integrated graphics is not capable of running this and many other games with lower minimum requirements.
Partly because of the overall processing requirements of the game, but also because many games require a certain
amount of VRAM, and VRAM (vs system RAM) is only found on dedicated graphics cards.
Integrated graphics has no VRAM and uses\shares the system RAM (as games also do when there is a graphics card with VRAM).
- Also note that DX12 Ultimate effects are limited to the current Nvidia RTX series gpu's, but games with those DX12 effects would
allow for other DX12 capable gpu's to run the game using other DX12 effects options in the games settings.
.