I presume this is with Log Manager.
Which version of Log Manager, and which patches? Which version of Java do
you have on your workstation?
Have you tried with an older version of Java (1.7.0_2x or earlier for
example), if only to prove it's a Java security problem?
TID# 7012887 addresses similar problems with the Sentinel Control Center
so that may help.
If you find this post helpful and are logged into the web interface,
show your appreciation and click on the star below...