Thread:Manual talk:Installing MediaWiki/Blank page

I'm trying to install a wiki on my server. I've been following the instructions on the installation and configuration pages, however, when I navigate to the wiki mainpage (the server IP) I receive the following error:

MediaWiki 1.21.2 LocalSettings.php not found. Please set up the wiki first.

When I clicked the link for setup (run the ms-config/index.php script) the page is completely blank.

I tried running the script manually through SSH and found I was experiencing this error "Fatal error: Class 'DOMDocument' not found in xxxxxxxx/Preprocessor_DOM.php on line nnn". I found the solution to be that my server did not have a XML module that was needed, so I installed that and now the script appears to work through SSH, however, I still see the page that tells me to setup the wiki and I still see a blank page when I click the link. Since there is no error here or on the SSH side, I'm not sure where to go from here. Any help would be greatly appreciated.