Hi Simon,
I am sorry for the delay of this reply.
Regarding your issue, it seems like the required javascript file for EasySocial was not found on your site? Please see
http://screencast.com/t/pCksfpa6eAid
May i know if your site is doing a new EasySocial installation or you are actually upgraded your EasySocial to 1.3.6?
Also, can you pass me your Joomla backend admin access and your ftp account so that it will ease our troubleshooting process?
You may include your site details at the below form under 'Site Details' tab and only moderator from Stackideas will be able to see the details
Please advise.