Hello Jos,

yes i guess that it's wrong.

The menu module name must be the real name of the module in the Joomla file system, so mod_djmegamenu
The menu module title must be exactly the title of the menu module instance such as 'Hoofdmenu' and it must respect case sensitive and spaces if any.
Once informations are exact the module DJ Mega menu will be included in AMP pages too. I don't know the state of its compatibility with AMP.

Kind regards
John D.