This was done on my City Plan Contest profile so it has most of the add-ons and hardly anything else.
I saw the pop-up of mods when loading and saw Clean my Settlement, so I enable that and Raze my Settlement too as I thought you probably have that.
Then when loaded and trying to export I kept getting CTD around 37-40% progress. I scrapped all the plots to rule them out and still got CTD.
Next I disabled Clean & Raze as they effect settlement objects, and that seemed to do the trick as I got layout to export successfully.
NOTE: The 1x1 Residential inside to the right of the workbench didn't have a plan for me so I may be missing its particular add-on.
I would suggest to create a layout from the log file attached, import it into a fresh settlement, and check over that plot.
Then you can try to export to your own log file for the city plan. It might be related to either Clean or Raze or both, I only tried with both disabled.
Just another thing I noticed, 3 of your the Internal are 'floating'
Martial plot by the radio - fix with: modpos z -12
In the internal room, Fits Two - fix with: modpos z -4
In the internal room, Double Bed - fix with: modpos z -9
When I do modpos I always put in a zero value (modpos z 0) after moving something - stops fuzzy objects, and with plots they will need either a pick up and TAB drop or Refresh once done.
Remember if you were to change them you will need to do it for all levels to avoid power grid issues.