Earlier in the game I couldn't continue the main quest because of the Join the Stormcloaks bug (more information): I had to use the setstage xyz command to fail the Joining the Stormcloaks quest to proceed.
But now I can't take it on. I talked to the guy in Windhelm who sent me to kill an Ice Wraith, but after ending the conversation with him, the quest disappeared from my journal and I can't see it anywhere: I tried using the setstage command again to make progress (
setstage CW01B 100 should make the quest go to return to Galmar stage, but nothing happens.
What can I do?