BuddyPress.org

Firstly I am using WordPress 4.0, BuddyPress 2.1.1, I am now creating my website. I installed BuddyPress and then decided to delete it. I am unable to deactivate it. I tried switching to the 2014 and 2011 WordPress theme and that did not work either. My website is using the Valenti Theme.
When I try to deactivate BuddyPress I keep getting the following messages that just keep repeating.

Warning: ksort() expects parameter 1 to be array, null given in /home/playbo7/public_html/wp-content/plugins/buddypress/bp-core/bp-core-template-loader.php on line 192

Warning: reset() expects parameter 1 to be array, null given in /home/playbo7/public_html/wp-content/plugins/buddypress/bp-core/bp-core-template-loader.php on line 197

Warning: current() expects parameter 1 to be array, null given in /home/playbo7/public_html/wp-content/plugins/buddypress/bp-core/bp-core-template-loader.php on line 201

Warning: next() expects parameter 1 to be array, null given in /home/playbo7/public_html/wp-content/plugins/buddypress/bp-core/bp-core-template-loader.php on line 207

etc.

Help Please. Now I know nothing about the technical side of wordpress or cpanels etc. I just know how to use themes.