Unable to DirectBoot UEFI laptops

We’re trying to switch over from having to modify the BIOS from Out-Of-Box (to disable "SecureBoot); to just being able to F12 and PXE boot.
We’re running into an issue with drivers it seems. We only Deploy three models of Dell Latitude laptops (7490, 5400 and 5420) and we’ve downloaded the specific driver packs for them as well as the Dell WinPE 10 driver pack and uploaded all into our Driver Library…but it still seems to be missing a driver.
I’ve attached a photo of the error we’re seeing.
Thanks in advance!!
Image from iOS|375x500

Hi, sorry but I can’t see the screenshot.