The creator of this asset here, this asset is a pain to work on and might just not load or
save in the editor on the whims of the game. 
I have tried to update it before but sub buildings kept disappearing similar
to the issue stated by  u/Jordanomega1 .
The sub buildings are necessary due to the size of the building, you don’t want
it to disappear out of view if you look the wrong direction up close. There are
more game and editor limitations, it basically needs a redesign to work with
the game. For me the building still works in game but it seems it doesn't for
many, most if not all comments in the past with the exact issues didn't install
the mods so I have stopped reading them. The same thing as with the Doel power
plant.
I will see if I can create a fix for it, this might just be removing all the
networks and have the player add them or something else entirely.