User units change

Hi,

I need change user's unit, but I got an errors:

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 2/17/2016 10:56:09 AM
Event time (UTC): 2/17/2016 7:56:09 AM
Event ID: 9ed761a810904572b452a27d39b08991
Event sequence: 169074
Event occurrence: 4
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/1/ROOT-1-131001313537088504
    Trust level: Full
    Application Virtual Path: /
    Application Path: C:\inetpub\wwwroot\
    Machine name: CRM4
 
Process information:
    Process ID: 4500
    Process name: w3wp.exe
    Account name: NT AUTHORITY\NETWORK SERVICE
 
Exception information:
    Exception type: TargetInvocationException
    Exception message: Exception has been thrown by the target of an invocation.
 
Request information:
    Request URL: http://crm/Company/_grid/cmds/dlg_changeorg.aspx?iObjType=8&iTotal=1&iIndex=0&ownerId={C426A579-EACE-E011-91B8-00155D001308}&ownerType=10&iId={230B77BF-C8F8-E111-81BE-00155D001308}
    Request path: /Company/_grid/cmds/dlg_changeorg.aspx
    User host address: 192.168.5.31
    User: INT\trweva
    Is authenticated: True
    Authentication Type: Negotiate
    Thread account name: NT AUTHORITY\NETWORK SERVICE
 
Thread information:
    Thread ID: 11
    Thread account name: NT AUTHORITY\NETWORK SERVICE
    Is impersonating: False
    Stack trace:    at Microsoft.Crm.Application.Utility.Util.RaiseXMLError(Exception exception)
   at Microsoft.Crm.Dialogs.ChangeOrgDialogPage.ConfigureForm()
   at Microsoft.Crm.Application.Controls.AppUIPage.OnPreRender(EventArgs e)
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
 
 
Custom event details:

Fault bucket , type 0
Event Name: CRMmanaged
Response: Not available
Cab Id: 0

Problem signature:
P1: 4.0.7333.3732
P2: w3wp
P3: Microsoft.Crm
P4: Exception has been thrown by the target of an invocation.;Hash='1491749764'
P5:
P6:
P7:
P8:
P9:
P10:

Attached files:
C:\Windows\Temp\tmpB330.tmp

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\NonCritical_4.0.7333.3732_fc6b89e68945ef59e44cb88d4d916ba759589bd_cab_369fb571

Analysis symbol:
Rechecking for solution: 0
Report Id: e79c0548-d54b-11e5-9f5a-00155d001308

Earlier, units change took place without error, right there. What can be done to solve the problem?