Hi Brajesh. I’ve been busy. Sorry for the delay.

Caching is OK. Flushed from server but still having the same problem.

These are the versions I use:
WordPress Version: 4.6.1
PHP Version: 5.6.27
MySQL Version: 5.6.28

The message is: Warning: Creating default object from empty value in XXX/wp-content/plugins/buddypress/bp-groups/classes/class-bp-groups-member.php on line 1122

This is the function on line 1122:

/**
* Get a list of all a given group’s moderators.
*
* @since 1.6.0
*
* @param int $group_id ID of the group.
* @return array Info about group mods (user_id + date_modified).
*/
public static function get_group_moderator_ids( $group_id ) {
global $wpdb;

$group_mods = wp_cache_get( $group_id, ‘bp_group_mods’ );

if ( false === $group_mods ) {
self::prime_group_admins_mods_cache( array( $group_id ) );
$group_mods = wp_cache_get( $group_id, ‘bp_group_mods’ );
}

// Integer casting.
foreach ( (array) $group_mods as $key => $data ) {
$group_mods[ $key ]->user_id = (int) $group_mods[ $key ]->user_id;
}

return $group_mods;
}

/*************/

Is this $group_mods new? How do I get rid of that warning? What has changed in this last update? I got the admin list but not a message saying there were no mods so, something has changed in the code.