"Index of /wordpress/blog"

I added a page and called it "blog".

The Permalink: url_of_website/wordpress/blog/.

Go to view the page and I get "Index of /wordpress/blog"
"Parent Directory ".

I click the "Parent Directory" to the "url_of_website/wordpress" and the blog page come up.

Please help.

Make sure you don't have any folder name "blog" in WordPress directory.

There is a folder named "blog" in the your wp installation which seems under domain_tld/wordpress/. You can either delete or rename the folder manually via FTP or cPanel or simply rename the page's slug using wp dashboard to "blog-2" or something else. Hope that helps.