Are you using SabreDAV for your project? How does it look when you go to it’s root directory?
Mine:
Either you can protect by .htaccess & .htpasswd with apache2 rewrite_mode. But there is an simple & easy way to hide it by creating an empty index.html. Like this:
Find all SabreDAV directories in /var/www and create an index.html
find /var/www/ -name SabreDAV* -print -exec touch {}/index.html \;
Check if the index.html is now in your SabreDAV directories.
find /var/www/ -name SabreDAV* -exec ls -l {}/index.html \;
Result:
