Crash: NPE in mcjty.xnet.apiimpl.fluids.FluidChannelSettings.insertFluidReal after enabling fluid insert to "Upgradable Geothermal Generator"

[sbrocket]

Issue description:

I encountered a server crash due to a NullPointerException when setting up a new Xnet Controller to pipe some Lava from Cauldrons to a Geothermal Generator:

https://gist.github.com/sbrocket/b761c89a0ca12d624a88f7c7a02513c8

Full crash report attached below.

Steps to reproduce:
I can "reproduce" this in that my server crashes every time now loading the latest world save, so I'm describing my configuration that led to this crash. I haven't yet restored a backup and tried to reproduce with different configurations.

1. Set up new controller, network to 4 Glass Cauldrons producing Lava + 1 Upgradeable Geothermal Generator + the Controller
2. Create a new fluid channel (the only channel)
3. Set all Glass Cauldrons to Extract
4. Set Generator to Insert...
5. Server immediately crashed

Other possibly relevant details: Generator was already full of lava.

Versions:

• Minecraft: 1.12.2
• Forge: 14.23.5.2838
• CompatLayer (only if on Minecraft 1.10 or 1.11): N/A
• McJtyLib: 1.12-3.11
• XNet: 1.12-1.7.6

Specifically, I'm using the Sky Factory 4 v4.0.8 pack without further modifications.

Possibly incompatible mods and versions: N/A?

Relevant logs, if any:

crash-2019-07-01_02.33.00-server.txt

[sbrocket]

Seems this is already fixed in newer versions. Updated Sky Factory 4 issue here to comment as such: DarkPacks/SkyFactory-4#308