Downloading the save as zip gives me two folders farrsville and Farrsville. Have you ever played this save on a Linux system? Linux systems usually handle files case sensitive, so farrsville and Farrsville would be two separate worlds there. Windows would thinks they are the same. So does Dropbox.
Farrsville/maps/ is an empty folder, but the other world data (the overmap, player data, artifacts, etc.) are there.
farrsville/maps/ contains many maps, but no general world data/save games etc.
If this save has never been on anything but Windows, than it’s probably not an issue at all.
Next thing:
The file Farrsville/o.0.1 is basically empty. I have no idea how that happened, sorry. This file would contain the things you see in the map view.
The file Farrsville/o.11930463.11930463 (and Farrsville/o.11930464.11930464) are uhm strange. The numbers are coordinates of those overmap, but the player starts at (0,0) and has to move quite far to reach those coordinates, and even than there would be maps of the area in between (e.g. o.0.0, o.1.1, o.2.2, o.3.3, … o.11930463.11930463). I have no idea how they appeared there.
Next thing:
Some map folders are empty (e.g. Farrsville/maps/5.0.-1). This should not happen. The game only creates those folders when it wants to write something into to it, so there should be some map files in it. The maps of your current position should be in Farrsville/maps/5.3.0/, but that folder is empty, too.
Next thing:
Why are there Tutorial.o.0.0 and Tutorial.o.0.-1 files in the save? Those should have been created in a tutorial game only, and a tutorial is always started in a world named “TUTORIAL”.
It seems that during saving something happened that caused the saving to abort. The map data is gone.
