Using the Fluent.Ribbon with Prism

[Yucca771]

When I try and use the Fluent.Ribbon with Prism it will not render and gives the following error: -

System.InvalidOperationException: 'Window must be the root of the tree. Cannot add Window as a child of Visual.'

Is there a working example anywhere or can anyone help?

[batzen]

I don't have any experience with Prism, but it looks like you are trying to add a Window (i guess a RibbonWindow) as the child element of another control.
Maybe your code to define a view uses RibbonWindow instead of Ribbon?