Plutonium

So yesterday I did the COTD easter egg solo then went to shang to do that easter egg and I had the vril device now today when I tried to load shang I do not have the vril device anymore even though I had it yesterday, I've restarted the game multiple times made sure the mod was loaded and made sure it was installed correctly which it was.

I am trying to do the Mob Of The Dead Easter egg with a friend and when I try to get the blue skulls for the blundergat on both solo and custom they don't work i have the retriever and i do every location correctly and i don't see the skulls popping up. It works just fine on public servers but not on solo or custom.