Mandatory information about my setup:

Have I searched the tickets before posting? yes
Have I searched the forum before posting? yes
Have I read the documentation before posting (which pages?)? yes
Joomla! version: 2.5.16
PHP version: 5.2.17
MySQL version: 5.0.96-log
Matukio version: 3.0.2
Direct link to the page that shows the issue: (unknown)

Description of my issue:
Welcome to the Matukio configuration section - here you can customize Matukio to your needs. For the Matukio ACL and the liveupdate configuration click on the Options button above. In this Tab you can find the basic and most important Matukio settings.
Warning: Invalid argument supplied for foreach() in /home/content/67/9453367/html/joomla25/administrator/components/com_matukio/helpers/settings.php on line 313