Error message

Hi, after installing the plugin on a single WP site in order to test I get this error message on the “Affiliate Settings”:

“Fatal error: Call to undefined function wp_editor() in /www/htdocs/w00d5489/ClaudeHopkins/wp-content/plugins/affiliate/affiliateincludes/classes/affiliateadmin.php on line 1210”

Besides, on the installed WPMU Dashboard page on this blog I am not able to log in my wmpu accoutn in order to retrive the API Key , when I click that link, nothing happens…