Hi,

We migrated our MIM schema and policy to a new environment, and we could log on as the 'MIM_Admin' account and see the MIM Portal for about 5 minutes...and then it just stopped. Now we get the following error in the MIM Portal:

Server Error in '/' Application.

---

Object reference not set to an instance of an object.

[NullReferenceException: Object reference not set to an instance of an object.]
   Microsoft.IdentityManagement.WebUI.Controls.UICacheUtils.GetCacheKey(CacheKey key) +266
   Microsoft.IdentityManagement.WebUI.Controls.UICacheUtils.RetrieveFromCache(UserNonSharedKey key) +25
   Microsoft.IdentityManagement.WebUI.Controls.NavigationBarConfigurationModel.RetrieveSiteNodeFromCache() +96
   Microsoft.IdentityManagement.WebUI.Controls.NavigationBarProvider.BuildSiteMap() +87
   Microsoft.SharePoint.WebControls.AspMenu.GetEditableSiteMapProvider(SiteMapDataSource dataSource) +43
   Microsoft.SharePoint.WebControls.AspMenu.AdjustForProviderMaximumDepth() +59
   Microsoft.SharePoint.WebControls.AspMenu.OnPreRender(EventArgs e) +46
   System.Web.UI.Control.PreRenderRecursiveInternal() +175
   System.Web.UI.Control.PreRenderRecursiveInternal() +272
   System.Web.UI.Control.PreRenderRecursiveInternal() +272
   System.Web.UI.Control.PreRenderRecursiveInternal() +272
   System.Web.UI.Control.PreRenderRecursiveInternal() +272
   System.Web.UI.Control.PreRenderRecursiveInternal() +272
   System.Web.UI.Control.PreRenderRecursiveInternal() +272
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6785

Looking in Event Viewer, we find the following:

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 11/16/2018 4:58:12 PM
Event time (UTC): 11/16/2018 4:58:12 AM
Event ID: f2427f75ca1f4dc382f821f7dee7032e
Event sequence: 51
Event occurrence: 23
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/1742489732/ROOT-1-131868080209261945
    Trust level: Full
    Application Virtual Path: /
    Application Path: C:\inetpub\wwwroot\wss\VirtualDirectories\80\
    Machine name: MIMService01
 
Process information:
    Process ID: 6056
    Process name: w3wp.exe
    Account name: TESTAD\svcsps
 
Exception information:
    Exception type: NullReferenceException
    Exception message: Object reference not set to an instance of an object.
   at Microsoft.IdentityManagement.WebUI.Controls.UICacheUtils.GetCacheKey(CacheKey key)
   at Microsoft.IdentityManagement.WebUI.Controls.UICacheUtils.RetrieveFromCache(UserNonSharedKey key)
   at Microsoft.IdentityManagement.WebUI.Controls.NavigationBarConfigurationModel.RetrieveSiteNodeFromCache()
   at Microsoft.IdentityManagement.WebUI.Controls.NavigationBarProvider.BuildSiteMap()
   at Microsoft.SharePoint.WebControls.AspMenu.GetEditableSiteMapProvider(SiteMapDataSource dataSource)
   at Microsoft.SharePoint.WebControls.AspMenu.AdjustForProviderMaximumDepth()
   at Microsoft.SharePoint.WebControls.AspMenu.OnPreRender(EventArgs e)
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
 
Request information:
    Request URL: http://portal.testad.com/IdentityManagement/default.aspx
    Request path: /IdentityManagement/default.aspx
    User host address: 192.168.205.123
    User: TESTAD\mimadmin
    Is authenticated: True
    Authentication Type: Negotiate
    Thread account name: TESTAD\svcsps
 
Thread information:
    Thread ID: 18
    Thread account name: TESTAD\svcsps
    Is impersonating: False
    Stack trace:    at Microsoft.IdentityManagement.WebUI.Controls.UICacheUtils.GetCacheKey(CacheKey key)
   at Microsoft.IdentityManagement.WebUI.Controls.UICacheUtils.RetrieveFromCache(UserNonSharedKey key)
   at Microsoft.IdentityManagement.WebUI.Controls.NavigationBarConfigurationModel.RetrieveSiteNodeFromCache()
   at Microsoft.IdentityManagement.WebUI.Controls.NavigationBarProvider.BuildSiteMap()
   at Microsoft.SharePoint.WebControls.AspMenu.GetEditableSiteMapProvider(SiteMapDataSource dataSource)
   at Microsoft.SharePoint.WebControls.AspMenu.AdjustForProviderMaximumDepth()
   at Microsoft.SharePoint.WebControls.AspMenu.OnPreRender(EventArgs e)
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Control.PreRenderRecursiveInternal()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Does anyone have a clue on what the problem might (suddenly) be - it was working...

thank you,

SK