when try to open my website i having this error
page contents
Warning: Cannot modify header information - headers already sent by (output started at /home/worldfre/public_html/wp-content/plugins/meta-tag-manager/meta-tag-manager-admin.php:10) in /home/worldfre/public_html/wp-includes/pluggable.php on line 896
what can i do plz help me...