Clear the browser cookies and check the issue again.
If possible , Uninstallaed all the existing java from the client and then Installed the JAVA from LMS ( as soon as you click on topology services > it will give you the option to installed the Java version which is compatible with you LMS version)
Also check your user id should have FULL Premission on c:\prgraom files\java\jre\lib\endrosed directory.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...