From the last two days, I am not able to access the dashboard of my self hosted wordpress.org blog.
Whenever I login to the dashboard with my user details, the page gets blank.
When I just open my blog's link (http://www.ityaadi.org), it is showing the following error message at the top:
Warning: Cannot modify header information - headers already sent by (output started at /home/ityaadi/public_html/index.php:1) in /home/ityaadi/public_html/wp-content/plugins/spammer-blocker/spammer-blocker.php on line 137
Can someone explain what this error message is and how to rectify it.