Please do not bump unrelated threads from 5 months ago. There is a much more popular thread about this exact issue you are experiencing.
Also, Blizz is aware and a fix is on the way:
https://twitter.com/Celestalon/status/1273370942094274561
Edit: there is no quest for chapter 2. The next Legendary quest in the chain will be next week when the challenges for that adventure open.