Character Animator and Media Encoder Fails to Export (Could not read from the source, please check..

So frustrating! I am up to date with both character animator and media encoder. I spent all this time creating a scene and now it won't export! What is the issue? Any help would be much appreciated.

- Source File: /Users/matttaylor/Documents/AE Puppets/Character Animator Project 2/Character Animator Project 2.chproj
- Output File: /Users/matttaylor/Documents/AE Puppets/Scene - Cornelius.mp4
- Preset Used: Match Source - High bitrate
- Video:
- Audio:
- Bitrate:
- Encoding Time: 00:00:00
03/02/2021 02:13:50 PM : Encoding Failed
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Could not read from the source. Please check if it has moved or been deleted.