Turns out, you have to clear the first set of Tree quests and get the reward before you synch up with the rest of the world!
I wasn't in a co-op game when I finished the campaign and started on the Tree, so didn't notice the issue.
Pretty poor from Blizzard to not make it clear what was going on/wrong
I wasn't in a co-op game when I finished the campaign and started on the Tree, so didn't notice the issue.
Pretty poor from Blizzard to not make it clear what was going on/wrong