Right click an oozing doll on a barrel full of milk: https://pastebin.com/iQEVcZwi

I have no power at my house so I can't fix, but I suspect it is because milk doesn't have a block form.

Hopefully I can fix it tomorrow.

My power came back and I took a look at this; I wasn't able to reproduce it.

Do you know which mod is adding milk in your game? You should be able to tell by turning on advanced tooltips (F3+G) and searching in JEI for milk; when you hover over the milk square (not the bucket) you should see the mod's name in the tooltip.

ok I'll see

Found that Erebus and NuclearCraft add milk, although Erebus's milk turned into a bucket of milk when i pulled it out of JEI.

Okay found that its The Erebus causing that crash

Okay, I could reproduce the crash with Erebus's milk; my first guess appears to have been correct. A new version should be available shortly.

A fixed version should be available on curse. Thank you for reporting.