This happens when there is no menu item associated with the contact or the contact's category.
The only way (I know off) to fix this is to create a menu that will not show on your site.
Create a new menu and create menu items into that menu for the contact categories you are using. Do not put the menu into any position of your template.
Go to the Trombinoscope module parameter page and add the menu items in the menu assignment section. Do that for any module you want to see on your contact page.
From now on you should see the module Trombinoscope alongside your contact.