Unable to Change Video in Editor - Storyline 3

I recently made changes to a lesson that included 30+ videos (downloaded from Vyond). Part of these changes included needing to replace many of the videos with shorter versions. After making the updates in Vyond, I attempted to use the Change Video option in the video editor. When saving the editor after choosing my file, I received an error (attached). I received the same error message for all videos throughout the course. I assumed it was just a corrupt file and replaced the videos manually.

Today, a colleague had the same issue with a different file he created. Is there a known issue or fix for this?

(We both are using Vyond videos downloaded in 1080p.)