There's a small group of players that are still experiencing issues with missing quests the new progression system in Hearthstone.

This issue is for returning player that accepted the returning player experience but did not finish the chain of quests. This news comes to us after compensation went live for a larger group of players that weren't receiving weekly and daily quests. Blizzard is working on a fix and will have it out "soon" and we can only assume similar compensation will be rewarded.

Quote From cmdylux

UPDATE 11/30: We’ve identified an issue with Weekly and Daily Quests where a player, under certain circumstances, can have a completely blank Quests log and will not receive new Quests. This bug has existed since patch 19.0 launched and is separate from the Weekly and Daily Quests issues hotfixed last week. Affected players are those who have opted out of the Returning Player Experience in the past but did not finish the Quest chain given afterwards. We’re aiming to have a fix out for this issue soon.