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?)? No
Joomla! version: 3.2.2
PHP version: 5.4.24
MySQL version: 5.6.14
Matukio version: 3.0.8
Direct link to the page that shows the issue:


Description of my issue:

After upgrade I have in backend error:
Warning: Illegal string offset 'class' in /data03/virt25508/domeenid/http://www.karellkiirabi.ee/htdocs/libraries/cms/html/html.php on line 965

Warning: Illegal string offset 'class' in /data03/virt25508/domeenid/http://www.karellkiirabi.ee/htdocs/libraries/cms/html/html.php on line 966

Warning: Illegal string offset 'class' in /data03/virt25508/domeenid/http://www.karellkiirabi.ee/htdocs/libraries/cms/html/html.php on line 966

Warning: Illegal string offset 'class' in /data03/virt25508/domeenid/http://www.karellkiirabi.ee/htdocs/libraries/cms/html/html.php on line 965

Warning: Illegal string offset 'class' in /data03/virt25508/domeenid/http://www.karellkiirabi.ee/htdocs/libraries/cms/html/html.php on line 966

Warning: Illegal string offset 'class' in /data03/virt25508/domeenid/http://www.karellkiirabi.ee/htdocs/libraries/cms/html/html.php on line 966

Can You help me?