The demo crashes after a couple of mins. The event viewer suggests it's an UE4 memory leak issue.
It may be when a resource hungry process such as a game or it's engine isn't freeing up or handling ram very well, until it crashes:
Fault bucket 1558362922347216157, type 5, Event Name: RADAR_PRE_LEAK_64. Response: Not available, Cab Id: 0.
Problem signature: P1: UE4Game-Win64-Shipping.exe, P2: 4.14.3.0, P3: 10.0.22631.2.0.0
My specs are: Intel 13600K, 32GB, 6800 GPU (latest 24Q4 Pro Driver), running Win 11 (reports as windows 10.0.2 above)
As it's crashing on both Nvidia and AMD, it is highly likely that many people are experiencing ram issues with this game. I haven't tested it on Battlemage but I suspect this will result in the same. Perhaps the game could be ported over to UE5 if it was more stable.