Did the game grash after it completed saving? If so, try deleting all of the files in the '
..\Divine Divinity\Run\Dynamic' folder.
This folder is used as a cache for the game. Files are created / copied there from the save game folder when you load, and written / copied from that folder when you save a game. The files will be re-created as required the next time you start Divinity. If there was a corrupt file in that folder, deleting the files should fix the problem.
If the game crashed mid-save, there may be files missing from the saved game folder. A new game should have 22 files, after going to either Verdistis or the Dark Forest it should have 27, and after going to both it should have 32.
BTW, among other things, the latest
patch adds multiple quick saves (the default is for 2).