April 2018
Quests run out, with new updates new quest come in.
May 2018
May 2018
May 2018
May 2018
June 2018
June 2018
No new quests for a few days level 29
June 2018
As was previously mentioned, you can run out of quests. Also, some quests have prerequisites.
The game says I have 5 quests left but it only shows 2 available (that are impossible for me to finish)
I just ignore quests since I can't complete a career collection, I completed them all long before that was a quest, and I can't buy a top, I bought all of them long ago.