I have problem to login on the homepage of LMS 3.0 returning blank page,even same with password incorrect.
There is a problem with your local password file. Shutdown Daemon Manager, then copy NMSROOT/lib/classpath/com/cisco/nm/cmf/servlet/orig/cwpass to NMSROOT/lib/classpath/com/cisco/nm/cmf/servlet/cwpass. This will reset your LMS password file to the default with only admin and guest as users. From there, you should be able to login as admin (with a password of admin), and recreate your users.