Add this to the main plugin file bp-groupblog.php:
/*** Make sure BuddyPress is loaded ********************************/
if ( !function_exists( 'bp_core_install' ) ) {
require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
if ( is_plugin_active( 'buddypress/bp-loader.php' ) )
require_once ( WP_PLUGIN_DIR . '/buddypress/bp-loader.php' );
else {
return;
}
}
/*******************************************************************/
Working on Group Blog here…
That additional code does not work for BP 1.2. Even with that code the plugin is not fully functional with BP 1.1.3 as new group members are not automatically added to the group blog until they are promoted to group mod or admin. Plugin author is working on an update for BP 1.2.
https://buddypress.org/forums/topic/bp-groupblog-error-call-to-undefined-function