I'm trying to use an /icons folder with my website, but it's not working
If you're trying to use /icons with your website, this is reserved for Apache.
It's used for the icons/images, such as the folder icons with an Apache directory listing.
If possible, use a different path for your website.
If you cannot get around it, then edit:
to remove or rename the Alias:
Alias /icons/ "/var/www/icons/"
This will break the apache icons, but most people won't even notice.