[Widowmaker]

I had the same problem.

You need 4.09 beta installed I believe.

The map uses statics from 4.09 beta.. and without 4.09 installed, the game wont save.

I did an ENTIRE road route on that map.... 20 segments..
went to save it so I could go harvest the sections and.. bam. No go.
That was a nice surprise.. and a waste of a full hour.