"Neruina cannot handle this exception. Please report this to the culprit mod author." So here I am doing just that, I think it's sculk trying to infect an alex's mob. I don't really know. I just added this mod to an existing world, reloaded spawn to get the tomb to start and now I'm crashing near it.
crash-2023-11-18_23.20.41-client.txt

This was resolved in the latest patch