both ss2 and ss2ch2 latest available, 2.0.0L and in all settlements, hence why it took so long to reply, and its not just city plans, its also layouts too, even those will not load in any settlement. and i have nothing that modifies terrain or settlement borders installed what so ever, even started a clean save with just ss2 and ss2ch2 installed with their dependencies and still had the issues
Well I tested a few other plans, there is a difference with how they worked before.
I tested with my full modlist (incl. X12 Plasmacaster) and in all cases the cinematic scene was very short, then the loading screen appears and after some time I dropped back in the game in Workshop mode. Finishd the conversation with the "major" Then looked around the settlement and saw only the "build" stage of every plot was triggered. (Foundation & wired powerpole) Then after some time the actual building starts.
In my first run I thought it was just a Fallout 4 thing, but I can replicate it every time.
I then went and disabled mods like High FPS fix, since they kick up framerates while loading screens and the like are running.
Had the same result as before, a very short cinematic scene, only the foundation and a wired powerpole where build.
The settlements where all "new" to me, I did not interacted with them before, or discovered them yet.
Based on these tests and my setup, I can imagine that in the given "game time" the cinematic scene and / or build sequence won't fire up.
If you have not installed it you can add Buffout 4 to your list, if you already have that, add Baka Scrapheap.
When you're comfortable with a texteditor or bethini you can also add / change these in Fallout4.ini:
[HAVOK]
iNumThreads=5 (is the maximum, if you have 4 cores set it to 4)
[Papyrus]
fPostLoadUpdateTimeMS=1000.0 (maximum = 2000, but we want things stable and not increase loadtimes to much)
Before doing any edits, do make a backup copy of your .ini file!
The idea behind these tweaks is to give scripts more "breathing room".
Downside of the Papyrus setting is that it will use that time, even if there is nothing to do.
I hope these settings wil benefit you, so that you can continue the game, which is the goal at the moment
A note on scrapping mods, fine for powerusers if you know what you are scrapping and what the impact will be.
If you use them because you find it tideous / boring etc. I do recommend the Settlement Salvage bot and choose during install the FIRST option.
When you put one down in a Settlement you setup it up via a menu and it will scrap the whole Settlement for you and dump the scrap in the workbench.
It's like you would scrap everything by hand on default settings, now it is automated in a lore-friendly way.
Hopefully this helps, other ideas / corrections are welcome ofcourse, if not we'll investigate further.