Problem with Big Sur and reminders

What I did: Recently upgraded to Big Sur. Installed latest Agend software. I’m attemping to add a reminder to a bullet point

What happened:
I can not select a reminders list from the drop down.

What I expected:

A drop down with my chosen reminder lists.

Things that might be helpful to know (Agenda version, OS and model, etc):

Mac OS Big Sir. Agenda Version 11.2.1 (160), MacBook Air

Does it help if you create a reminder first in the reminders app?