Would it be possible to change the assignment structure? Currently, the assignments are locked and they have to be completed in order, but (except for this one), I didn't have a question for the Community to move past the first assignment.
Is the audio issue generally in the Webex application or specific to when in meetings?
Are you using the macbook speakers or a headset? I like to disconnect my headset and use speakers to simplify isolating the issue.If the speakers are working well ...