BuddyPress Events Calendar plugi: Fatal error: Class 'BP_Events_Event' not found

Hi there. I need help with Wordpress/Buddypress single site. I need help for installing BuddyPress Events Calendar plugin. I'v uploaded the plugin but when I activate it I get a fatal error: Fatal error: Class 'BP_Events_Event' not found in ........wp-content/plugins/bp-events/bp-events.php on line 215