You can access the Joomla-Folder via the component "ProFiles" in the backend ....
But please let me know which file(s) you have to replace as I have to duplicate this on my Testserver ....
I have helped you apply the fixes in the following files. JoomlaFolder/administrator/components/com_easysocial/includes/template/helpers/avatar.php
JoomlaFolder/components/com_easysocial/themes/wireframe/helpers/avatar/user.php
Can help me double check to make sure the fix works? Thanks.