Visitors get the "Directory Exposure Error" when the website displays a list of directory contents. For example, the page could show a list of directory with a "Index of" page like below. Or it could also show it by media addresses such as "http://domain.com/images/2016/06/test.jpeg".
If the website shows the server structure, it means hackers can attack this web server even more easily. Therefore, it would be great to make sure the website does not disclose server information.
If you need help, please submit a ticket through https://cloudbric.zendesk.com/hc/en-us/requests/new or e-mail us at email@example.com.