Error when trying to export to video (Mac)

[Jason-Holt]

Describe the bug
On two different Macs, when attempting to export to video from file menu, receive the notifications, "Could not export. An error occurred." and "TypeError: Cannot read property 'on' of undefined."

To Reproduce
Steps to reproduce the behavior:
On Mac with current version, Menu -> Export to Video with notifications on. The errors above will display.

Expected behavior
Export to exports folder.

Screenshots

Desktop (please complete the following information):
Mac

Additional context
All of the other export options work fine. I've tested this on two different Macs with brand new installations of Storyboarder, and several new projects of varying length and limited complexity.