A lot of complaints on Reddit about this bug too, none of the GM replies listed there seem to be able to help. Like others mentioned, unlocking DH seems to fix a lot of collection / mode issues but the quests staying empty is pesky. Sorry you’ve got to endure that, have a 
Maybe one day Hearthstone players will be appreciated.
Doing DH prologue fixed deck issues, but the Quests section is still blank for me.
Hopefully they fix the issue, or maybe it will fix itself when it’s the next week?
I would love to hope that it’ll be fixed next week but based on the responses I’ve gotten, and the responses others have gotten, it looks like Support doesn’t have a solution and even confuses our problem with a different one.
I’ve finally received a response from the support. They say they’re aware of the situation and the team is working on a solution, they also linked this topic: Dailiy/weekly quests not showing up and said to follow it for updates.
Unfortunately they aren’t aware, the thread they linked you makes no mention of this happening to returning players, because despite all of our forum posts and bug reports, they aren’t being read, only scanned by some third rate AI I imagine.
Guys it just working now! I have all my quest weekly and daily quest, when before my quest page was totally blank, what I did it’s just sing in in asia server in PC , then play until I accomplished some of the quest and get some coins, like drawing 10 cards and playing 15 minions, playing two games in any mode and other one I don’t remember, now I sign in in my android in my normal server (america’s) and surprise! There were all my newly 6 quests there. Hive it a try only have to play some hours, i have to say never played in asia before so went trough all the tutorial and practice toninlock new heros also won some standard matches . I hope this is a fix i know how annoying this is.bi was a returning player too
It was indeed fixed. I didn’t need to do any of the things you’ve mentioned, quests are just here 
finally!
I still have/get no daily & weekly quests on Asia-Server - EU and NA are fine
Anyone knows what to do?