Ok, I think I see what happened, it's a bug that I think was caused by certain stories (sweltering stars or gone ox?) creating a site as an outcome, where the site is outside the current map. This was left over from way back, before we switched to a tile-based overland map. Those events need to be changed, and we'll also add some code to detect and fix these issues in save games, like yours. That will be in the next patch, which is probably sometime next week.
Also I noticed a couple crash logs, those are graphics related. Updating to the latest graphics drivers from the manufacturer might resolve them.
Thank you for reporting this!