Placed an extra utils 2 wireless RF receiver near an energy relay, was temporary to kickstart an xnet controller since it cannot start on its own, and the server went down with an NPE.

https://gist.github.com/xannor/bf38b5d6c6911fd0ce3cd6e1b03da69a

Could not recover server, as soon as it comes up this repeats, will have to edit world to remove the wireless rf receiver.

Update: MCEditing the world and deleteing the RF tile entity allowed the service to start and I could then break the RF block to recover it.

Closing as I do not believe this is relevant any longer. This may have been a one time thing.