Symptoms

SharePointRoleProvider.GetGroupContainers
 

Diagnoses

This error is constantly showing in the Event Viewer of our K2 production environment with all the Security Providers, in this case is "K2 Apps Home". Please provide documentation. The K2 service account is Site Collection Administrator in all those Security Providers sites.

0 SharePointRoleProvider.GetGroupContainers: System.Reflection.TargetInvocationException: An unexpected failure was encountered when contacting SharePoint to get information from the group provider K2 Apps Home: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at SourceCode.SharePoint15.Client.GroupFunctions.GetGroupContainers(String groupName, Boolean throwException)
at SourceCode.Security.Providers.SharePoint.Shared.SPCsomClient.SourceCode.Security.Providers.SharePoint.Shared.ISPGroupProviderClient.GetGroupContainers(String groupName)
--- End of inner exception stack trace ---
 

Resolution

The application was removed and then re-configured.