Assuming you have the CMS, which is required to publish web content to the www subdomain, you need to edit the settings of your home page and remove the content slug (which should currently contain home or /home) so that just the root subdomain is shown. Then update.
Assuming you have the CMS, which is required to publish web content to the www subdomain, you need to edit the settings of your home page and remove the content slug (which should currently contain home or /home) so that just the root subdomain is shown. Then update.