"If you notice a serious mistake in a course, please contact us. Include information about the mistake, including links to supporting evidence that it is a mistake.
Serious mistakes might include:
An assignment deadline set before the course start date
A broken link to a resource required for an assignment
A video that has no subtitles
If you notice a typo or minor error in a course, please do not report it. Typos do not affect the course experience significantly for most users, and reporting them makes it more difficult for instructional staff to address real issues in course content."