Error: zip archive add failed when creating a snapshot

I got the following error message when creating a snapshot. This happened after all the database tables were completed and it got the the Files :: Themes section.

ERROR: zip archive add failed [Array ( [type] => 2048 [message] => call_user_func_array() expects parameter 1 to be a valid callback, non-static method sociable_Admin_Options::init() should not be called statically [file] => /PATH HERE/web/wp-includes/plugin.php [line] => 405 ) ]