Error when try to update customer order status through Admin

[reya276]

I keep getting this error everytime I try to update the actual order status( email option checked) for the customer through the admin.

 

Fatal error: Call to undefined function: is_null() in /usr/local/plesk/apache/vhosts/mynoddle.com/httpdocs/admin/includes/classes/email.php on line 363

 

I tried going to the page and fix it but I rather not touch it since I can't find anything wrong with it.

 

Can anyone help get this done I need to launch in about a week HELP PLEASE!!!!!!!!

[xaglo]

response of a newB :wink:

the path http://www.mynoddle.com/httpdocs does not seem to be good. are you sure to have filled the paths well in configure.php??