So at the beginning, I joined up with the Stormcloaks and did the proving myself quest. Then I got the Jagged Crown quest and never finished it. It says to talk to Galmar but I didn't finish.
Then I continued on with the main quest and got the quest Season Unending. It says to talk to Ulfric Stormcloak, but he keeps saying, “What are you doing? You should be out there finding the Jagged Crown.” But when I talk to Galmar, he says, “I can't believe you talked Ulfric into talking with the Imperials. What a waste of time, if you ask me.”
It's in a never ending cycle. I don't know what to do. Also, I'm on Xbox 360.