I am receiving a pluggable.php warning sign on my only http:// page


I just recently shared a link to my site ysing he http but instead of redirecting, i just displays this:

Warning: Cannot modify header information – headers already sent by (output started at /home/thecmltm/public_html/index.php:1) in /home/thecmltm/public_html/wp-includes/pluggable.php on line 1281

Warning: Cannot modify header information – headers already sent by (output started at /home/thecmltm/public_html/index.php:1) in /home/thecmltm/public_html/wp-includes/pluggable.php on line 1284

I have searched all over the web but they all talk about function.php or wp_configure.php but that is not what my problem is. I have tried editing the index.php but nothing is wrong with it.

Please help me. Thanks in advance!