BackupBuddy schedules things to run in the background in a way that isn't inherently compatible with our servers. It is possible, however, to add a couple of directives to the ".htaccess" file in the same folder as your "wp-config.php" to resolve this issue.
The lines that need to be added are:
RewriteEngine On
RewriteRule .* - [E=noabort:1]
