Why am I getting an Error: 'Permission denied: Activity Name' when editing a Venue?

This error occurs when attempting to update the venue when the user is not the owner of the activity.  In order to edit/update the venue and view the heatmap:

1. Update the ownership of the activity you are attempting to view the heatmap. You can find out how to do this from this article.
2. Head back into the Athlete in Activity report and update the venue.

You will now be able to view the updated data.