I am struggling to change the buddypress group avatar but cannot able to change it. I searched a lot on google but only find to customize the size of buddypress group avatart or find some code to change the default group avatar. So any body can tell me that how can I change the buddypress group avatar. Actually what I need a PHP script that can able to change the buddypress group avatar by using some hooks etc. Any help would be appreciable.
follow this article it will help you to change default avatar in BuddyPress
https://buddypress.org/support/topic/changing-the-default-mystery-man-avatar/
https://downloads.wordpress.org/plugin/add-new-default-avatar.1.3.1.zip
download plugin and install it