ID: 11256 Title: Extension API change: html.header and html.top_heading require breadcrumb argument Component: Multisite Level: 1 Class: New feature Version: 1.7.0i1 This change is only relevant in case you have custom GUI extensions that implement custom HTML pages. In case you do this, it is likely that you use the <tt>html.header</tt> or <tt>html.top_heading</tt> methods. Once upgrading to 1.7 you will have to update your code to hand over a breadcrumb as second argument. This can be done like this: C+: from cmk.gui.plugins.main_menu.mega_menus import ( make_simple_page_breadcrumb, MegaMenuSetup, ) title = "My custom page" html.header(title, make_simple_page_breadcrumb(MegaMenuSetup, title)) C-: For more examples have a look at our code and search for the keyword breadcrumb.