"Select a file" Not Working in Acrobat

Hi --

I'm on a Mac. When I tried to create a PDF this morning, the "Select a file" button does not open the Finder so I can select a file. When I click the button, it changes color to show it's been clicked, but there's no action. It doesn't matter if I specify a single document or multiple. No place where it says "Add files" works. My Creative Cloud account is active and I have the most recent version of Acrobat running

How do I troubleshoot this and fix it? A search in this community and with Google provided not results.

Any help would be appreciated.

I'm using  a Macbook Pro running Sonoma 14.0.

Thanks.

John