In the newest forge there was a breaking change that removed FluidID's or something like that. Its not a major issue but you should update to the newest.
http://pastebin.com/v3Chqd9E

I suggest using the recommended build: 10.13.2.1291
We will see if that change is an actual change or not. Right now it's only breaking compatibility with many mods and it's the newest build, so do not expect us to move there instantly. With our builds we always try to keep up with the recommended builds of Forge, which is what everyone is advised to use.

Even never builds fix it allready

The issue was on forges side. They fixed it and LP now has no Problemo

So "We will see if that change is an actual change or not." has come true ;)