acrobat freezes during launch, with white box in the center of a gray-shaded screen

I am working on a MacBook Pro with OS 12.6.8 (Monterey) and suddenly today Acrobat (part of a Creative Cloud subscription) consistently freezes whenever I try to launch, showing a grayed-out screen with an empty white box in the center. (Once the white box included part of a blue "loading" circle, which would progress one frame at a time if I clicked the grayed-out portion of the screen. See screenshot attached.)

Acrobat doesn't show as "not responding" in the drop-down list when I go to force-quit it, but there's no other way to get it off of the screen. I've tried uninstalling Acrobat, restarting my Mac, and reinstalling Acrobat, but that has not helped.

Does anyone have ideas that might assist? Many thanks!