When this mod is installed together with RandomThings, there's a crash when I try putting slime into any crafting grid.

Log:
https://gist.github.com/4rz0/0e35181ca73e32b97d5f787896291ef8

Minecraft 1.9.4, Forge 12.17.0.1964, RandomThings 3.7.3, YeOldeTanks 1.7.2

Other mod's crash-report:
lumien231/Random-Things#87