Warning:Cannot modify header information - headers already sent by, When Adding Friends on Buddypres

Hello

This is happening when i Click :Add Friend"
It does function and I do get the "friendship Requested"

Here is the exact error:

Warning: Cannot modify header information - headers already sent by (output started at /home/content/88/8949788/html/desi/wp-content/themes/studio/_inc/ajax.php:431) in /home/content/88/8949788/html/desi/wp-content/plugins/sitewide-privacy-options/sitewide-privacy-options.php on line 496

Any ideas why this is happening?

Best
Aaron