Default layouts missing

First time creating in Dorico on a Mac. 4 part choral with piano. I see the players selected but when I add and view Soprano for example the layout screen is black. Tried “create default part layouts” with no change.
As a check I imported a piece from Finale and see all the part layouts correctly. Not sure how to fix this issue.

That suggests you have not connected Player-Flow-Layout in Setup.

(oops - welcome to the forum)

Thanks. I donʻt understand what step I missed but by thrashing around in the setup screen, deleting several layouts with no content and then trying once again to create default layouts, it worked!

Think of it as a wiring diagram. Player(s) on the left connected to flow(s) at the bottom and to layout(s) on the right.

(It can get a little confusing because you can create lots of different layouts - think parts - for the same basic music)