error message

hi
this might bother you:
i am getting following error messages on screen since i installed your plugin:
(database name changed into “database”)

Warning: Cannot modify header information – headers already sent by (output started at /home/database/public_html/content/themes/twentyfourteen/functions.php:1) in /home/database/public_html/wp-includes/pluggable.php on line 1121

Warning: Cannot modify header information – headers already sent by (output started at /home/database/public_html/content/themes/twentyfourteen/functions.php:1) in /home/database/public_html/wp-includes/pluggable.php on line 1121

Warning: Cannot modify header information – headers already sent by (output started at /home/database/public_html/content/themes/twentyfourteen/functions.php:1) in /home/database/public_html/wp-includes/pluggable.php on line 1121

thank you for help.

beda

https://wordpress.org/plugins/buddymenu-buddylinks/