Came back for the new content. Same old Ubisoft garbage.
Error: 006000139 happens in skirmish or dominion
Also, I learned that turning off matchmaking so you can play with just AI or party members, will not let you receive end of match rewards. It confuses the servers and "takes to long to respond". So, if you just want to play with AI, you can't complete quests.
My frame rate also seems to be worse since the update. It should easily be above 100 like it used to be. Now it struggles to get past 80. I've seen it drop into low 50's. I did discover turning on Vsync greatly improved smoothness though, so I'm not monitoring max FPS. That's when it dropped down to 50, with Vsync on.
i7-4770k and GTX 1070 all updated drivers.
You'll see that error when the connection is lost between players during a session: see here.
Please report the errors to support so we can look into the problem.
I'll also make a note to the team about the fps issues.
(moving to community support! - you can also post your problem in the megathreads there and someone will answer you)