Kaltura Remix in CCK field - widget error

Issue Summary

Hello,

I've added a cck field of type Kaltura Media Remix to a content type and when I create content and click "Add Kaltura Remix" button, the screen goes grey and the outline of the widget opens up but instead of the remix widget it shows this error:

Fatal error: Uncaught exception 'KalturaException' with message 'Invalid KS "", Error "-4,INVALID_TYPE"' in /Users/travis/Sites/uva_commons/sites/all/modules/kaltura/kaltura_client/KalturaClientBase.php:310
Stack trace:
#0 sites/all/modules/kaltura/kaltura_client/KalturaClient.php(3601): KalturaClientBase->throwExceptionIfError(Array)
#1 sites/all/modules/kaltura/includes/kaltura.themeing.inc(310): KalturaMixingService->add(Object(KalturaMixEntry))
#2 [internal function]: kaltura_contribution_wizard('a:6:{s:8:"kshow...', 'My Remix')
#3 uva_commons/includes/menu.inc(349): call_user_func_array('kaltura_contrib...', Array)
#4 uva_commons/index.php(17): menu_execute_active_handler()
#5 {main} thrown in sites/all/modules/kaltura/kaltura_client/KalturaClientBase.php on line 310

I got this on a clean drupal 6 instance.
I'm using the Kaltura commercial platform.
The kaltura settings at admin/settings/kaltura/general all give the green check.
The field config options are all defaults.

This was working several months ago and I don't know what changed. Any ideas?

Thanks,
Travis McCauley
Toronto, Canada