Error opening shared document via CloudKit

CloudKit sharing was introduced this year and I'm trying to implement it. I'm using the `UICloudSharingController` and I'm saving the share and its root record in the completion handler which succeeds. However, when I share the link (e.g. via iMessage) and open it on another device (different iCloud account, same build), it shows the following error: Couldn't open "Share" You need a newer version of `APPNAME`to open this, but the required version couldn't be found in the App Store. If you're not sure which version to use, check with the owner. As this is a new app, it is of course not in the App Store. I need to test sharing first (Chicken or the egg?), so anyone knows how to test CloudKit sharing?