Report page for domain not displayed

[dataanywhere]

The report page on a few of our Plesk boxes are blank when displayed through the CP. After enabling php errors this is what we see:

Warning: main(api-common/DatabaseManipulator.php) [function.main]: failed to open stream: No such file or directory in /usr/local/psa/admin/plib/backup/BackupCore.php on line 10

Fatal error: main() [function.require]: Failed opening required 'api-common/DatabaseManipulator.php' (include_path='/usr/local/psa/admin/plib:/usr/local/psa/admin/javascripts:/usr/local/psa/admin/plib/locales:/usr/local/psa/admin/auto_prepend:/usr/local/psa/admin/htdocs/domains/databases/phpMyAdmin:/usr/local/psa/admin/htdocs/domains/databases/phpPgAdmin') in /usr/local/psa/admin/plib/backup/BackupCore.php on line 10

We have the exact same build on other servers that don't have this problem.

Before I spend too much of our time trying to solve this, has anyone else run into this? I've already checked the include paths, the php script does exist in plib/api-common/.

Plesk version 8.0.1, build : 8.0.1-fc2.build80060613.20

Thanks,
Geoff