Not sure what exactly the issue is, something about chunk generation with your caves for my machine causes the mod to be unstable. Lowering my render distance helps, but if I load too many chunks too fast it will crash my game

Minecraft log https://paste.ee/p/GCD0a
My dxdiag DxDiag.txt

Hmm, try updating to 0.5.0 and see if the issue persists 😅