ERROR Object reference not set to an instance of an object

Hello 

I have been getting this Error when trying to use Bentley substation connection 

error text

Void RestoreCatalogPaths(Bentley.DgnPlatformNET.ConfigurationVariableLevel): Object reference not set to an instance of an object.
0: at ECT.ECAD.API.WorksetConfig.RestoreCatalogPaths(ConfigurationVariableLevel level)
1: at ECT.ECAD.API.WorksetConfig.Restore(Boolean isWorkspaceConfig)
2: at ECT.ECAD.API.SystemSetup.RestoreNodeFromVariable(XmlDocument doc)
3: at ECT.ECAD.API.SystemSetup.Restore()
4: at ECT.ECAD.API.SystemSetup..ctor()
5: at ECT.ECAD.API.SystemSetup.Recreate()
6: at Bentley.Electrical.UI.Command.CommandEntryServiceBase.Init(Int32 hwndMode, Int32 hwndLayer)