Thread:Project:Support desk/Fatal error attempting to run install

I uploaded mediawiki to my server, renaming the folder to simply, "wiki" first.

I go to my server URL/wiki/ and see the install link.

When I click on that setup link, I immediately get the folowing error:

Fatal error: Class 'DOMDocument' not found in /var/www/html/wiki/includes/LocalisationCache.php on line 542

How can I fix this so I can proceed?

Thanks, Chris