Issue Description:

I recently automated a Blood Altar and now my server is crashing when it loads it. It only started happening after I restarted the server, it is not what caused the initial shutdown. I had to roll the world back to fix it.
crash-2018-04-20_12.42.32-server.txt
crash-2018-04-20_12.37.16-server.txt

Affected Versions (Do not use "latest"):

• BloodMagic: 2.2.8-91
• Minecraft: 1.12.2
• Forge: 2641
• Mods: list.txt

We are also dealing with this issues right now with the Mystical Misadventure public server. Pretty much the same crash report. Admin brought the server down for an update... I had an automated altar that was processing stone into slates at the time he brought it down.

BloodMagic: 2.2.8-91
Minecraft: 1.12.2
Forge: 2623
Mods: modlist.txt

Somehow recipe is null when this line is reached

Thanks for the report! Not one I've encountered before, but the bug was probably there for a while.