What does the issue “Processing Error” mean in UDOIT File Review?

UDOIT encountered difficulty while trying to scan your file.

Any file that fails to scan in UDOIT will be labeled a "Processing Error."

Processing error often means the file is too large for UDOIT to scan, or UDOIT encountered difficulty while scanning the file, due to file corruption, server error, etc. 

If the file is fairly large, you can try breaking it down into smaller sections, uploading those to Canvas, and then re-scanning the course.