Got the same D3D12 error code at startup on my desktop since the last APEX update.
Intel I7 3770K - latest driver
32GB DDR3 RAM
Radeon 7870 2GB - Crimson Edition 16.5.2.1 Hotfix
Windows 10 Pro - Up to date
Tried it on my Lenovo Y50 laptop, runs without issue
Intel I7 4700 HQ
16GB DDR RAM
Geforce GTX 860M 2GB - 365.19
Windows 10
Edited by user Thursday, May 19, 2016 10:07:15 AM(UTC)
| Reason: Not specified