Debug error

Hello,

I found this error in my debug.log file

Deprecated: Function create_function() is deprecated in /home/site/public_html/wp-content/plugins/buddypress-followers-master/_inc/users/widgets.php on line 113

Warning: Cannot modify header information – headers already sent by (output started at /home/site/public_html/wp-content/plugins/buddypress-followers-master/_inc/users/widgets.php:113) in /home/site/public_html/wp-content/plugins/sg-cachepress/core/Supercacher/Supercacher_Helper.php on line 41

thanks