Content tree structure not showing in the "Move" dialog in DAM/Sites

Hi,

We have upgraded from 6.0 to 6.1. We found that when we try to move assets in DAM and try to select the new destination using the browse(magnifying glass icon), we dont get the entire content tree but just one entry called "Websites".

We found the below error in browser console that below call was returning a 404 error.

http://preprod2-author.advenio.companyname.com/bin/tree/ext.json?_dc=1479900611347&predicate=siteadmin&_charset_=utf-8&path=%2Fcontent&node=xnode-461

Any pointers what is wrong at server side?

Thanks,

Anil