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 an "Index of" page. Or it could also show it by media addresses such as "http://domain.com/images/2016/06/test.jpeg".
If hackers have access to the website’s server structure, it makes the web server more vulnerable to hacking attacks. 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.