Need Help! with Nuclear Engines - KSPIE and NFE and Mk3 Stockalike

[Ace76inDC]

Howdy, I have a head-scratcher.  I have Near-Future Electric and KSP Interstellar Extended installed.  The engine in question is the Hades nuclear engine from the Mk3 Stockalike mod.

After the latest KSPIE update, don't know if it's connected or not, I get a "Core Overheat, Reactor Shutting Down" error.  Oddly the engine was shut down when I loaded the ship.  

When I go to the Hades engine in question, I see the temperature is "NaN/3200K", meaning not showing a temp at all.

I can turn on the engine only via the Near-Future Electrical control panel, but I can only turn it on.  No change to the temperature "NaN" at all.

Oddly I have another ship flying with the same engine, and I am not getting the same error.  Reactor is working as it ought to be.

 

Tried searching the forums and tried uninstalling and reinstalling KSPIE and NFE.  I've been playing this save for about a year now, don't want to lose one of my favorite ships!

 

https://imgur.com/a/JvjCg91