Thread:Project:Support desk/Can't contact the database server: Access denied for user 'wikiuser'@'localhost' (using password: NO) (localhost))/reply (12)

That doesn't seem correct. Your LocalSettings.php is usually placed in the MediaWiki installation folder, not inside "includes". Please check that a LocalSettings.php exists on your installation directory (and not in any subdirectory) and that database settings are correct.