Hello,
I am really sorry for the delay of this reply. Regarding your issue, I've fixed internally and attached is the updated file to address this issue. Download the php file 'stream.php' and copy the file to folder 'JOOMLA/administrator/components/com_easysocial/models/' and overwrite the existing stream.php file. Remember to backup the original file first before you overwrite with this modified version.
The fix will be added into next release of EasySocial as well
Hope this help and have a nice day