Thank you for taking the time to report a bug or typo. We appreciate the help. You can submit a bug report via the learning environment in any course. This will alert our engineering team to the bug's location and urgency.
Scroll down to the bottom of the instructions page inside the learning environment and click the link in the section "Report a Bug".
For example:
Instructions page:
Report a Bug link, click 'here'.
Submit the bug report:
NOTE:Please include the URL of the exercise you are on in the description field.