Need help with getting Opefire to work with LDAP

I'm trying to install Openfire on a Windows 2012 (virtual) server.  I'm having trouble with the initial setup, on Step 3 of 3 for LDAP integration.  The 'test settings' appears to be successful for each of the 3 substeps, and shows the 9 groups that I want to use for group mapping, but when I save and continue I got an error which I don't no how to understand.

Here's our Windows Active Directory\LDAP structure for the users and the groups used to categorize:

[Company.Domain]
     [FolderXYZ]
          [Groups]
               [MasterGroup] (groups A-D are members)
               [GroupA]
               [GroupB]
               [GroupC]
               [GroupD]
          [Users]
               [UserA] (Member of GroupA)
               [UserB] (Member of GroupB)
               [UserC] (Member of GroupC)
               [UserD] (Member of GroupD)

====================================================

Here is my Opefire Step 1 to 3 of LDAP setup
-------------------------------------------------------------------------------- ---
Step 1 of 3: Connection settings:

LDAP Server
Server Type: "Active Directory"
Host: [Domain Server IP address] Port: [default]
BaseDN: "DC=[Company], DC=[Domain]"

Authentication:
Administrator DN: [companydomain]\[userid]
Password:[password]
(Advanced Settings left default)

TEST Status: Success!
-------------------------------------------------------------------------------- ---
Step 2 of 3: User Mapping
Username Filed: "sAMAccountName"
(Advanced Settings left to default, no search field here)
User Profiles (vCard) - (settings left to default)

TEST: User Mapping successfully draws several users and their appropriate info fields as expected!
-------------------------------------------------------------------------------- ---
Step 3 of 3: Group Mapping
Group field: "CN"
Member Field: "Member"
Description Field: "description"
Advanced Settings
Poxis Mode: NO
Group Filter: "(&(objectClass=group)(cn=[MasterGroup]))"

Test: Group Mapping finds Group Name [MasterGroup] with 9 members (as looks appropriate if I understand the purpose of this filter)
====================================================
Save and continue generates the following error message:

HTTP ERROR 500

Problem accessing /setup/setup-admin-settings.jsp. Reason:
    Server Error

Caused by:
java.lang.NullPointerException
at org.jivesoftware.openfire.admin.setup.setup_002dadmin_002dsettings_jsp._jspServ ice(setup_002dadmin_002dsettings_jsp.java:113)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1669)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:11 8)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1652)
at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:76)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1652)
at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingF ilter.java:53)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1652)
at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:80)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1652)
at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:162)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1652)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:22 3)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:11 27)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185 )
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:106 1)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandler Collection.java:215)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.jav a:110)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:499)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635 )
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Unknown Source)

I appreciate any suggestions or comments.  Thanks!