“Error: pssessionid is not defined
Source File: https://RHYTHMYXSERVER:PORT/Rhythmyx/sys_resources/js/browser.js
ln 430, change
if(pssessionid == undefined || pssessionid.length == 0)
if(typeof(pssessionid) == ‘undefined’ || pssessionid.length == 0)
That resolves the issue. However, note that sys_resources is commonly affected by patches and upgrades. I will file this issue with Percussion TS and report back the bug number if one is assigned.