Same, can't connect, and it makes SP unplayable because you can't access Crafting and Skills, and my game freezes when I resume after it fails to connect, and I have to quit to the menu and reload my save.
Please Fix up this issue as clearly we are all having issues even with SINGLE PLAYER mode.
I took a day off not to have connectivity issues with SINGLE PLAYER mode.
Why? Uplay - and errr... not a clue. nor as to why maintenance like this (apparently via other comments on similar topics) would knock the game out of practical use. Steam needs maintenance too but games don't become unplayable without it connected to something.
Apparently European servers are working. I did play this morning for 3 hours, for 2 hours now I cannot play. BUt some friends in Europe are playing in coop too.