As the title says.
MC Crash Report https://gist.github.com/Shadows-of-Fire/32b85dde7a6ae81d44f33839943087c8
FML-SERVER-LATEST.log https://gist.github.com/Shadows-of-Fire/70368724f17aec7cf5e74a2ff42acb08

Yes, I've made a stupid mistake, will be fixed later today.
Same problem as CyclopsMC/IntegratedDynamics#51

Fixed in CyclopsMC/CyclopsCore@890d99b
New release of CyclopsCore coming later today.