Mandatory information about my setup:

Have I searched the tickets before posting? Yes
Have I searched the forum before posting? No
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: (2.5.27)
PHP version: (unknown)
MySQL version: (unknown)
Matukio version: (5.0.2)
Direct link to the page that shows the issue: (http://www.haugesund.kommune.no/kurs-oppvekst/bookings/0/26)


Description of my issue:
I get an 403 error (not authorized...) when I try to view the participant list. The backend setting is All (public).