There was a slight change in Kode's application feed which caused that. The system was working correctly with the feed as it was on 7/15. Sometime on 7/16 the feed changed (The notice that the feed was changing probably got lost in a PM along the line)
Since you were running in the appFeed mode, you could have reverted back to the old template mode and it would have worked correctly. (Or, with the update 7/16, hit Update Applications, and the error would have fixed itself)
Thanks for this! I didn't see the error but when I went to add an application the add container page would be empty instead of prefilled. Clicking the "Update Applications" on the Docker tab for CA worked and now I can add applications again.