custom-post-template error

Hi,

I get this error in the header says

Deprecated: Required parameter $page follows optional parameter $function in /customers/9/6/3/sedshop.se/httpd.www/wp-content/plugins/custom-post-template/plugin.php on line 183 Warning: Cannot modify header information – headers already sent by (output started at /customers/9/6/3/sedshop.se/httpd.www/wp-content/plugins/custom-post-template/plugin.php:183) in /customers/9/6/3/sedshop.se/httpd.www/wp-includes/pluggable.php on line 1416 Warning: Cannot modify header information – headers already sent by (output started at /customers/9/6/3/sedshop.se/httpd.www/wp-content/plugins/custom-post-template/plugin.php:183) in /customers/9/6/3/sedshop.se/httpd.www/wp-includes/pluggable.php on line 1419

Ive just updated the theme and the plugins, i dont know where the problem is.

Any tips?

Website url: sedshop.se

Best regards
Psed