macOS High Sierra: Failure calling PowerPoint to process presentation

macOS High Sierra users moderating Collaborate Original sessions are unable to load PowerPoint slides onto the whiteboard.

Any attempt to load slides result in an error:

Workaround

Export the presentation slides as images, and load those into the Whiteboard.

This is a common workaround for issues when loading slides onto the Whiteboard, you can see the steps you need to take below.

Loading a PowerPoint Presentation