Can't get Ulfic Stormcloak to agree with the peace truce in "SEASON UNENDING"
If you can load an earlier save point - Upon completing the objective in Joining the Stormcloaks, enter the Palace of Kings and proceed to the room where Ulfric and Galmar are debating and instantly talk to Ulfric. It requires multiple attempts of requesting to talk before he finally does but once he talks to you, you will be able to continue the Season Unending quest as normal.