problem with IOC container

Inri

Hello,
I would like to ask for probably fix or some kind of advice how to fix for this error:
Type not found in cache: RobotStudioWrapperLib.Interfaces.IControllerManager.

I am working on addin, which was working correctly till version 6.07. Since 6.07 I´m getting this error when my plugin is used and then switch to another table(such as Controller, Simulation, Modeling, Home...).

Whole process is like this:
-user click to my addin(new tab in top menu, next to Add-Ins
-user click on button on ribbon. here is wpf control with some functionality. At this point is used viewModelLocator
-user can freely continue to work with addin, everything is ok
-when user click on any other tab beside addin it throw RS Fatal Error(Unhandled exception) : RobotStudio .NET exception: Type not found in cache: RobotStudioWrapperLib.Interfaces.IControllerManager.

here is Exception from RS:

Base exception: ActivationException

Type not found in cache: RobotStudioWrapperLib.Interfaces.IControllerManager.

   at GalaSoft.MvvmLight.Ioc.SimpleIoc.DoGetService(Type serviceType, String key, Boolean cache) in c:\MvvmLight\Source\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (PCL)\Ioc\SimpleIoc.cs:line 586

   at GalaSoft.MvvmLight.Ioc.SimpleIoc.GetInstance[TService]() in c:\MvvmLight\Source\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (PCL)\Ioc\SimpleIoc.cs:line 912

   at ABB.IOF.Config.AddIn.IoAddIn.OnActiveRibbonTabChanged(Object sender, EventArgs e)

   at System.EventHandler.Invoke(Object sender, EventArgs e)

   at ABB.Robotics.RobotStudio.Environment.UIEnvironment.set_ActiveRibbonTab(RibbonTab value)

   at ABBInternal.StudioAppFramework.RibbonControl.OnMouseDown(MouseEventArgs e)

   at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at ABBInternal.StudioAppFramework.RibbonControl.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Any ideas? 
When I am debuggoing after this exception whole RS is closed, so it is complicating my life big times.
in nonDebug mode RS continue to work(After clicking on No option), but still making me uneasy what else this can affect later.

Thanks in advance
BR Ondrej

Inri

Solved.
problem was in my case in one row: ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);
New version RS probably using Service locator as well so its important to have it separate in every case.