Loading error

Dear Giulio:

After upgrading to weaverbird´s latest version

i´m getting the following error

running on rhino 5 (latest update) and grasshopper 08.066

should i update to gh 09.12?

Object: AntiprismComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: AntiprismComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: PrismComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: PrismComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: PyramidComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: PyramidComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: LaplacianComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: LaplacianComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: LaplacianHCComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: LaplacianHCComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: CatmullClarkComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: CatmullClarkComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: LoopComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: LoopComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: SplitPolygonsComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: SplitPolygonsComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: SplitQuadsComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: SplitQuadsComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: BevelEdgesComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: BevelEdgesComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: BevelVerticesComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: BevelVerticesComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: CarpetComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: CarpetComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: FrameComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: FrameComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: OffsetComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: OffsetComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: ThickenComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: ThickenComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}

Object: WindowComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: WindowComponent (level 2)
{
Method not found: 'Void Grasshopper.Kernel.GH_PersistentParam`1.SetPersistentData(**UNKNOWN TYPE**)'.
MissingMethodException
}