The Views module makes it possible to define areas into which you can assign content. For example, you could configure your view to place a Text Area inside the footer of the view.
However, you can also create more complex configurations, perhaps even placing a view inside the footer of a parent view.
You will see this error message when you have tried to configure a view area to use display a nested view, whereby the nested view is actually the same view as the parent view.
This can also operate with deeper degrees of nesting, for example:
View A --> (Footer Area) --> View B --> (Footer Area) View A
The solution is to alter the view area configurations so that no views are nested that appear higher up the nested view chain.