I am running into the same error page and at the same time as NicCo.
I dont think the issue is the PXE rep running on Server 2012 R2 VM. I have other model laptops able to PXE and provision just fine.
I am trying to provision the new Dell Lattitude E7450 (this model just seems to have lots of driver issues...)
Please assist and provide guidance.
THanks!