TreeView and GridView demo project not working

I am trying to check the Treeview and Gridview demo project but when running it, I get this message in the homepage: "Could not create widget TreeView.widget.GridView: TypeError: Object doesn't support this action" Also, when trying to navigate to other pages, I get an error like that: "Configuration error in TreeViewwidgetTreeView_0: TreeView config error: No Entity settings found for type: UserTree.DummyContext" I am using version 5.11.1 of the modeler (conversion worked fine). Is there any way to solve this issues?
1 answers

I managed to find the issue - it seems to be related with the browser I was using. For the moment, IE and Chrome give errors, but I manage to run it in Mozilla. Perhaps useful tip in case someone else has the same trouble in the future.