Description of the issue:

Looking at a sequencer from RFTools crashes the client. I was building an Endergenic generator setup from RFTools, and as soon as I placed the sequencer down, I received this crash. Once I logged back into the server, it crashes immediately. I had a friend visit my base, and as soon as he looked down at the sequencer the crash occured.

I am unsure if this is an RFTools or Immersive Engineering issue, however, due to Immersive Engineering being mentioned in the crash log, I am posting here.

Crashlog:

https://paste.dimdev.org/hepupanuqe.txt

Versions & Modlist

Immersive Engineering: 0.12-82
RFTools: 1.12-7.33
Forge: 14.23.3.2698

This crash should not happen IMO, and the context makes no sense at all. Some of the mods you have installed (CreativeCore and LittleTiles) make changes to MC's networking code, could you try without these mods?

Can do, I'll test it asap and post my findings.

So I tested without on singleplayer, and that's fine. So it only seems to crash when I'm on the server. Unfortunately removing mods from the server-side and subsequently the server map just causes errors with ids etc. So I'm not sure what to do in this situation.

It is a TOPAddons bug, nothing to do with Immersive Engineering, as I suspected. Sorry about this, I'll close the issue now :)