Can't seem to get this version running, Unity just crashes out each time I try to open it up. Not sure if my crash logs are sent to you or not, but I'd be willing to share what I get back.
Viewing post in Phase 1 Rebuild Released! comments
Quick question: Are you playing it on a laptop?
That error relates to something inherent in UnrealEngine, and one cause is if it's running on a laptop without the power cable plugged in, which is weirdly specific.
If it is laptop, it could be Nvidias Battery Boost causing it. "NVIDIA GEFORCE EXPERIENCE → GAMES → BATTERY BOOST → DISABLE IT"
If it's on desktop, the recommendation is updating GPU drivers and see if that fixes it.