The server crashes when I go nether or end.

Crash log:
https://gist.github.com/Blackpanter23/ff46b13de7f9f90b95acae479e908361

I don't see anything pointing to IE in that crashlog, looks more like TATW (the mod that makes IC2 use FE) to me. I assume you thought it was related to IE because of

WARNING: coremods are present:
  IELoadingPlugin (ImmersiveEngineering-core-0.12-86.jar)
  CoreMod (Aroma1997Core-1.12.2-2.0.0.0.b161.jar)
Contact their authors BEFORE contacting forge

? That (usually) isn't relevant for reports to "normal" mods, only for reports to Forge.

Yeah, closing this for inactivity and that nothing points towards IE.