After installing the latest SecureLogin single sign-on plug-in(sso.npm) in iManager, when you access the SecureLogin preferences java.lang.NullPointerException : null error appears.This error occurs because in iManager SecureLogin single sign-on plug-in(sso.npm) upgrade did not successfully replace all the old files.
Workaround: In iManager, remove the jssoapi.jar or jsso-api.jar file from the location imanager\tomcat\webapps\nps\WEB-INF\lib, restart the tomcat sever that hosts the iManager and then install SecureLogin single sign-on plug-in(sso.npm).