Check your antivirus, possibly it blocks GD from writing into my documents folder.
upload your saves somewhere and post a link, I have a program which fixes them.
i turned off antivirus and tryed again , same problem this is not antivir . I thint this is not problem with my saves .
There are 3 common problems with losing progress - grim dawn doesn't have writing rights into the folder, some pricky antiviruses like to cut them (could be windows defender), cloud saves, where cloud save data overwrites new progress back - I hear it happens most often when you have both steam and gog versions.
To make your old saves appear in expansion is an absolutely different issue which I can do if you upload them.