Messages: Use addValue() only for string, numeric and boolean. The NULL type is not allowed.
File: /var/www/kig.hu/src/common/classes/vendor/Debug2.php: Line #11
Stack trace:
#0 /var/www/kig.hu/src/common/classes/vendor/TMData.php(116): Debug2::throwException('Use addValue() ...')
#1 /var/www/kig.hu/src/visitor/classes/pages/PageMultiPage.php(29): TMData->addValue('pageTitle', NULL)
#2 /var/www/kig.hu/src/visitor/index.php(155): PageMultiPage->getHTML()
#3 {main}