We got a new batch of Dell latitude 5591 laptops and I set up WDS (server 2019) and MDT (6.3.8456) Created my own capture task sequence. First I had to inject updated drivers into the litetouchpe_x64.wim and add that to the boot images in WDS before the laptop would even PXE boot. Finally got it to PXE into WDS and ran the litetouchPE_x64.wim, but it kept failing with the above error as soon as it went to sysprep.
Booted into win10 and manually ran the litetouch.vbs, worked fine.
How to get this to work over PXE?