Key controller Free floating slate tab UI crashing the editor

Development Programming & Scripting UI
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1

i am working on a procedural generation plugin and i need some free floating editor window to control the generation so i have made a child class of docktab i have function to toggle spawning the tab and the function is bound to a specific key .
the ui class link : SGenerationControllerTab
the function code

void ABaseProceduralActor::ToggleTab()
{
	TabID=SGenerationControllerTab::TabName;
	TSharedPtr<SDockTab> Tab =  FGlobalTabmanager::Get()->FindExistingLiveTab(TabID);
	if (Tab.IsValid())
	{
		FGlobalTabmanager::Get()->UnregisterTabSpawner(TabID);
		return;
	}
	else
	{
		// Open the UI if it's not already open
		TSharedRef<SGenerationControllerTab> Tabb = SNew(SGenerationControllerTab);
		Tabb->RegisterTabSpawner();
		FGlobalTabmanager::Get()->TryInvokeTab(Tabb->GetTabIdentifier());
		
	}
}

so when pressing the key while running the game in the editor
its crashing the editor
can anyone help me why this is happening