Online quizzes that contain images can create downloading issues in recent versions of the Safari browser. As a security measure, recent verions of Safari are now set by default to block "cross-site tracking," which prevents some types of embedded content from a different web page or platform from loading correctly. In order to fix this, quiz takers must must be turned off the "prevent cross-site tracking" option in Safari.
Alternatively, quiz takers can use a browser other than Safari.
After the settings are modified, it may be necessary to log out of Canvas and log back in to see these changes.