Running an AD domain and have the users showing up in LDAP sync screen.  Only users set to System Administrator can login to the Forms Portal.  If I change a user to "Basic User" or "Process Creator", the login screen hangs.

All of the users are Named users.  As a System Administrator, all runs fine.  Obviously we can't make everyone a System Administrator.  Any help would be great.

Here is the event logged by a user that isn't a System Administrator:

Log Name:      Application
Source:        Laserfiche Forms
Date:          1/29/2014 3:11:14 PM
Event ID:      0
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      LF.iafrate.local
Description:
1/29/2014 3:11:13 PM | Session: w34fsnyqge2tfqetcp0vwisx
User: aic\CThomson
URL: /forms
Username: S-1-5-32-548
Message: Operation or command invalid for the requested type of object. [9000]
Stack trace:    at Laserfiche.RepositoryAccess.AccountReference.GetFromServer(HttpUrl uri, Session session)
   at Laserfiche.Forms.CommonUtils.LFAccountService.GetDirectGroups(Session lfDb, String activeDirStr, String name)
   at E_Forms.Infrastructure.Security.LfFormsNamedUserSession.RepositoryGroupMembershipProvider.GetDirectGroups(String name)

Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Laserfiche Forms" />
    <EventID Qualifiers="0">0</EventID>
    <Level>3</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2014-01-29T20:11:14.000Z" />
    <EventRecordID>2736845</EventRecordID>
    <Channel>Application</Channel>
    <Computer>LF.iafrate.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>1/29/2014 3:11:13 PM | Session: w34fsnyqge2tfqetcp0vwisx
User: aic\CThomson
URL: /forms
Username: S-1-5-32-548
Message: Operation or command invalid for the requested type of object. [9000]
Stack trace:    at Laserfiche.RepositoryAccess.AccountReference.GetFromServer(HttpUrl uri, Session session)
   at Laserfiche.Forms.CommonUtils.LFAccountService.GetDirectGroups(Session lfDb, String activeDirStr, String name)
   at E_Forms.Infrastructure.Security.LfFormsNamedUserSession.RepositoryGroupMembershipProvider.GetDirectGroups(String name)
</Data>
  </EventData>
</Event>