Under my wpforo menu appears a second Hamburger menu item in the black bar which contains the same content as under the tab My Profile (Account -Activity-Subscriptions). I checked all my settings but cannot find the problem. The menu doesn't appear in the "Appearance - Menus" section. Does anyone knows how to hide the Hamburger menu?
This is not wpForo menu. This is your theme or some other plugin input. Please disable all plugins and change the theme to find the menu adder.