To allow Excalibur work properly, you will need to give Accessibility permissions for Premiere Pro.
Normaly, after Excalibur installation, when opening Premiere Pro, it should prompt you with dialogs:
If you don’t have these pop-ups, you can grant permissions manually. Go to: System Preferences > Security & Privacy > Privacy. Go to each section, hit “+", find your Premiere Pro version, add it, make sure it has a tick mark.
Sometimes macOS doesn't have permissions right, to reset them do this:
- give permissions to Premiere Pro (accessibility/input monitoring), skip if permissions already granted
- untick Premiere Pro in permissions
- restart computer
- tick Premiere Pro back in permissions
- launch Premiere Pro and test