today I just opened my 1,5 month old project and wanted to add a new In-App-Purchase to the app, so I added all the information to iTunesConnect, didn't change anything for the existing ones. When I now run the app ALL of the purchases won't work, I'm using MKStoreKit but the SKRequest also doesn't throw any errors. In addition I'm getting the following logged in console without adding iCloud support:
NSUbiquitousKeyValueStore error: com.mycompany.myapp has no valid com.apple.developer.ubiquity-kvstore-identifier entitlement
Any suggestions what is going on and/or what I could have broken?