mvn install sakai:deploy is running successfully but at run time it gives error
org.sakaiproject.portal.api.PortalHandlerException:
java.lang.IllegalArgumentException: Unable to find registered context for tool with ID sakai.employee at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:862) caused by: java.lang.IllegalArgumentException: Unable to find registered context for tool with ID sakai.employee at ... (check the revision history for full stacktrace)
Check catalina.out for errors when you start Tomcat.
The tool web app has not started up.
You'll need to resolve those errors before the tool will load.