I have tested the app and, when I was scanning and I pointed to the image this log showed up:
08-29 00:06:12.800 17485 17542 I Unity : Found IR Item with name: test item 1
That means that the cloud recognition is working fine. But then I got that error message:
08-29 15:19:41.517 2399-2399/? E/CraftAR Unity SDK 2.1: Invalid content for item test item 2: Unknown content type (x)
So I imagine that you are trying to show a CraftAR Item that you have created from the website and not from our UnitySDK. If you are running a unity app created with our UnitySDK, it will only show AR Items that were created from the UnitySDK itself.
If you create an AR Item with the UnitySDK and you publish it, the same app should recognize it and show its the AR Item correctly.
Catchoom Support Team