Power should only be sent server side.
InnovativeOnlineIndustries/Industrial-Foregoing#98
TechReborn/TechReborn#1161

I am getting this issue as well.

Running a server, and anytime a client goes anywhere near the area, we are getting client side crashes.

What caused the issue: the player in question placed down a Petrified Fuel Generator from Industrial Forgoing and crashed to desktop.

Anyone who now goes near the area crashes to desktop.

https://pastebin.com/06J7hTx5

(Excert from log)

this was probably fixed a while ago... I see the generator code tests for !world.isRemote before distributing power.