I can't use Key Sync/Key Reset, Pitch Play, or Key Shift when I'm using Serato DJ Pro. Why not?

Key Sync/Key Reset, Pitch Play, and Key Shift are functions of the Pitch 'n Time DJ expansion pack.
To use Pitch ‘n Time DJ, you'll need to buy and activate it first.
See details on the website below:
https://serato.com/dj/pro/expansions/pitchntimedj