Error when load vvvv sdk

Hi vvvv team,

I am playing with v4 sdk, doing a plugin with MyPlugin.sln. As I did many times, yesterday I tryed to compile my plugin, and since I did that, I’m not able to open v4 anymore and this is the error I get :

GetExportedValue cannot be called before prerequisite import ‘VVVV.Hosting.Factories.StartableRegistry…ctor (Parameter=“parentContainer”, ContractName=“System.ComponentModel.Composition.Hosting.CompositionContainer”)’ has been set.

Thanks by advance for your help,