As I wrote in my ticket update:

Well, I started the story (Chapter I) not all too long ago since my return, but for some odd reason, that one remained within my quest log regardless of having finished all chapters up to chapter 11. But I will try to do that and see what happens. Thanks for the idea/advice. :-)

What did you do precisely to rectify this? I tried to replicate the solution to no avail. I have both Chapter I and Chapter XI in my quest log at the moment, and I can't abandon Chapter I. What I did was: click "play" on Chapter I -> Click play on Chapter XI and try to speak to Aric Jorgan. I tried doing this both by resetting and not resetting that particular phase of the quest before entering again. Can't seem to continue the story like this. =/