Opening a device property page in ZENworks Control Center (ZCC) doesn't work and generates an unspecified error on the page.

Re-posted from Remote Management sub-forum (frankly not sure which to post on as none really seem to fit with this issue):

ZCM 11.2.4
Running on SLES 11
Xenserver environment

ZENworks Control Center (doesn't matter whether IE11 or FF 22)
When I attempt to open a device (Devices > Workstation > (workstation hostname link))
"Novell ZENworks Control Center - servername has encountered an error. The details are shown below"
Details refer to zcc.log

A portion of zcc.log:

Exception Info:
16 May 2016 11:41:36 Class....... javax.servlet.ServletException
16 May 2016 11:41:36 Message..... File "/jsp/core/upload/PathSelector.jsc" not found
16 May 2016 11:41:36 Logged at... ErrorPage...........124
16 May 2016 11:41:36 ============== Exception (end) =============================

When I hunt down the filename that is not found, it is in fact, not found.
The same on our 3 primary servers.

Thanks for taking a look.