Blank EPUB Interactivity Panel in InDesign 16.3.2 on MacBook Pro (Retina, 15-inch, Mid 2014) running OS 10.15.7 Catalina.
I have uninstalled and reinstalled InDesign. I've installed it again deleting all old prefs. I've restarted reinstalled software and dumped prefs on start up holding down Shift/Ctrl/ALT/Cmd keys, and 'Yes' clicked when asked if I want to delete preferences file. I am at my wits end with this issue.