HTTP Status 500 - error when saving settings

We are doing our first installation for ServiceDesk Plus. We are going through the wizard just fine, but when we try to save ANY changes in 'General\Self-Service Portal Settings', we see following error.

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:545) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:486) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) com.manageengine.servicedesk.common.filter.ResetThreadLocal.doFilter(ResetThreadLocal.java:26) com.adventnet.servicedesk.filter.EncodingFilter.doFilter(EncodingFilter.java:162) org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:350) com.adventnet.servicedesk.authentication.NTLMV2CredentialAssociationFilter.doFilter(NTLMV2CredentialAssociationFilter.java:34) com.adventnet.servicedesk.authentication.NTLMV2Filter.doFilter(NTLMV2Filter.java:176) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)

root cause

java.lang.NullPointerException com.adventnet.servicedesk.setup.action.SettingsAction.execute(SettingsAction.java:415) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) com.manageengine.servicedesk.common.filter.ResetThreadLocal.doFilter(ResetThreadLocal.java:26) com.adventnet.servicedesk.filter.EncodingFilter.doFilter(EncodingFilter.java:162) org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:350) com.adventnet.servicedesk.authentication.NTLMV2CredentialAssociationFilter.doFilter(NTLMV2CredentialAssociationFilter.java:34) com.adventnet.servicedesk.authentication.NTLMV2Filter.doFilter(NTLMV2Filter.java:176) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)

note The full stack trace of the root cause is available in the - logs.