Repository cannot display in Breadcrumb mode

Hi,

Currently I changed the layout set of a folder (/root/documents for example) to ConsumerExplorer_2, which is a modification of ConsumerExplorer, to add some new commands. However, when I clicked on it to see its contents, the tree and path information that should show in the left and the top both disappeared. That's, I cannot see the parent node when I drilled deeper.

I just changed the ResourceActionGroup of the resource render and nothing else. So is it a problem with the KM Navigation iView?

Thanks,

Ray