if i want to open the HostingSpace "System" i becom the following error:

Event code: 3005
Event message: Es ist eine unbehandelte Ausnahme aufgetreten.
Event time: 05.11.2016 16:26:58
Event time (UTC): 05.11.2016 15:26:58
Event ID: 57f54aef43e64d0eb076d527164e95d8
Event sequence: 467
Event occurrence: 4
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/7/ROOT-2-131205016634243469
Trust level: Full
Application Virtual Path: /
Application Path: C:SolidCPPortal
Machine name: SERVER01

Process information:
Process ID: 4732
Process name: w3wp.exe
Account name: HOSTEDSCPPortal

Exception information:
Exception type: NullReferenceException
Exception message: Object reference not set to an instance of an object.
bei SolidCP.Portal.Utils.CheckQouta(String key, PackageContext cntx)
bei SolidCP.Portal.SpaceQuotas.Page_Load(Object sender, EventArgs e)
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Control.LoadRecursive()
bei System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)