I reconfgured the management IP address and default gateway of PS6210X whilst on site. I tested access before I left site. When I got back to the office I was unable to connect to the Group Manager although I could SSH successfully.
The following error appeared:
Connection to the server could not be established
I upgraded the firmware to the latest version to rule that out.
I notcied a few posts online about editing java and/or disabling "Encrypt Communication" but that didnt seem to be relevant here.
The issue was actually a security port problem. The networking team had to open up TCP 3002 and 3003 to the device in order for us to access the device.