If you get the following error after installing WordPress on your server “Fix the Not Authorized to View This Page [CFN #0004] error WordPress” log into your server with FTP and check your .htaccess files. In my case I used a one click WordPress installer to add a WordPress install to a subdomain (a folder off of the root). The one click installer added a .htaccess file to the root folder of the website which broke the main site. Checking the .htaccess file the following code had been added:
I changed that to
In my case that fixed the site. Hope this trick helps somebody!