CB

This is due to the <submenu> <menu../> usage expecting a link attribute with the URL to the view and not just a view attribute. Test if both can be provided and be sure this won't break backend menu creation.

https://www.joomlapolis.com/forum/145-community-builder/246282-an-error-has-occurred-0-you-must-specify-a-non-empty-path-to-clean#335846