I did a default install of rollbase, and it works at the "free version." My boss then purchased a cluster license, I installed it, restarted tomcat, and now, when I go to the login.jsp page, and enter my credentials, it says "page not found" however, if i remove the license.xml file and restart tomcat, it works again.
Please make sure server name in license file matches server name in your installation. Are you using localhost?
We can create Development license for you since you're paying customer.