PHP Fatal error: Call to a member function getRow

Hi all,

I am getting error 

[17-Feb-2016 07:53:50 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/sitename/public_html/karl_dev/inc/utils.inc.php:412) in /home/sitename/public_html/karl_dev/inc/design.inc.php on     line 100

and line 100 is composed of:

header( 'Content-type: text/html; charset=utf-8' );

Any idea how can I fix this?

Thanks a lot!

Karl

Most probably site can't connect to the database, this is the reason you get this error.