Its doesn’t stuck on loading - it’s stuck when play. Engine completely dead after . You can’t kill process by task, only reboot, but after normal work.
Can you check compatibility with 4.20 (OpenVRExpansionPlugin , functions that I mentioned)?
For my library I’m tryed include all classes, but maybe didn’t make some #define or other cpp magic stuff (on the screens I gave - there is all code with one (I guess) linker error)