Drawing Seed Model listed in Red in Plan and Profile Sheet Creation

ORD Connect 2020 Release 2 Update 8 - Version

I have been following the Bentley Learn link for "Under the Hood - Setting up Sheets - Part 1 and 2" to set-up our sheets for the first time.

Iv'e created my Drawing Seed, Sheet Seed, Border Drawing, my config variables point to the correct seed files, and I'm using my dgnlib file to create my Named Boundaries.

When I get to the Create Drawing dialog, the OK button is grayed out and the Drawing Model>Seed Model: in listed is red, hovering over it doesn't give me any info on the error. See attached.

What is the error about? The seeds are listed properly in my config file.