warning message

Warning: Creating default object from empty value in /home/marclagu/public_html/wp-content/plugins/buddymobile/includes/bp-mobile-class.php on line 41

Warning: Cannot modify header information – headers already sent by (output started at /home/marclagu/public_html/wp-content/plugins/buddymobile/includes/bp-mobile-class.php:41) in /home/marclagu/public_html/wp-includes/pluggable.php on line 896

I got this error message after installing a buddypress plugin and now I can’t even go in to deactivate whichever one is making this error. Please help… I couldn’t figure this out for the life of me. This is my first post and I just started using wordpress and I have got a ton to learn.