I think I somehow broken the main quest and now I can't continue the game. I was able to finish the quests “Winds of Steel” AND “Bronze Beneath the Lake” and now none of the sides want me at the end of chapter 2.

Could someone be so kind and check my savegame below.

Muflak, the upcoming patch will prevent this from happening (it can occur when a certain dialogue path with Clyver adds the Winds of Steel quest even though Bronze Beneath the Lake is already in the journal - the quests are supposed to be mutually exclusive).

 

Here's more detailed info:

 

http://forums.obsidian.net/topic/72793-major-plot-progression-bug-act-2-the-duc-invitation/

 

It's unfortunate that you ran into the issue and I want to thank you for your patience - I hope the info helps a bit.

 

Jorge