error in communities plugin

Fatal error: Cannot redeclare change_email_body_to_html() (previously declared in /home/cipherla/public_html/wp-content/mu-plugins/communities-framework.php:126) in /home/cipherla/public_html/wp-content/plugins/communities/communities-framework.php on line 128

I installed the plugin using latest version and followed instructions and uploaded the files to

Communities.php - goes in /wp-admin
Communities-framework.php - goes in /wp-content/mu-plugins

But when i created a community the above errors occured