Visited screen of selected action not visible

I installed Piwik on one domain and linked also other joomla websites on that same and other domains to it.
When clicking the visit profile of a visitor for each action a string shows which pages the visitor has visited.
For all the additional websites the visited screen becomes visible when I activate such a string. However, on the main website that doesn’t work and the following screen “Not Found, the requested URL /nl was not found on this server” shows up:

How could I also make those screens visible?