1. 6. Set The plugin Settings:
To set plugins go to plugin manager from the top menu of the joomla administration panel.
6.1. Set Directory Path
First set the directory path to original location of the directory/ folder on your server( important –
with slash at end), example “/home/vhost/public_html/mediawiki1/”
6.2. Set Cookie prefix
Then after set cookie prefix to: “mw_”