Thread:Project:Support desk/Error when installing MediaWiki./reply (4)

You tried to include FlaggedRevs without installing it. You need to run update.php to add the db tables that extension needs, or you need to remove that line from LocalSettings.php

FlaggedRevs is hardly the only one of those extensions that need to be "installed" in some way. I believe that CentralNotice, TitleKey, Torblock all need either special configuration set to work, or db tables. Several others probably also need other config to work.

Each of these extensions have a manual page explaining how to install them on this wiki (For example Extension:FlaggedRevs, Extension:CentralNotice, etc). I suggest you read those pages.