Course corrupted - Is there a debug option to see if 1 slide corrupted on Storyline360?

Import the first half of the course into a new file and publish that. If it publishes without error, you know the problematic slide is in the second half. Import one half of the second half into a new file and publish. Just keep repeating the process until you narrow down the section containing the problematic slide. It's much quicker to do this than publishing one slide at a time.