Updated 04/13/17: The 6.6.4 Reviewer app has now been approved by Apple and everything has been restored at this time.
Thank you for your patience.
04/12/17: We have resolved the issue and you can now generate a new iOS build (66D150) to submit to Apple.
A 6.6.4 version of the Designd Reviewer app has been submitted to Apple, it is in 'Waiting for Review' status and should be approved within 2 - 3 business days.
Please note that if your content is still not working in the Reviewer it is because you are still on version 6.6.3 or older and this will be resolved as soon as Apple approves the 6.6.4 Reviewer app. In the meantime, you can generate an iOS build and test your content that way.
04/11/17: We are aware of the issues being presented with the latest update to our iOS app builds and Reviewer app that include content not working, displaying properly or missing. We are working to resolve this issue as quickly as possible. This is also affecting our current 6.6.3 Designd Reviewer app and we will have a new version available in the App Store as soon as possible.
At this time, please do not generate and submit a new build or update your iOS app with build version 66D131 until further notice.
We apologize for any inconvenience this has caused and we will update you as soon as it has been resolved.