Missing Info.plist key

The description of why you want to use a given feature is a recent requirement from Apple. It's the text that appears in a dialog the first time the user invokes that ability. You have to say to the user why it is you need to access that feature.

In the app-descriptor xml there is a section called InfoAdditions, in the iPhone section. That's where you'll see UIDeviceFamily, that has a 1 or 2, or both, depending on what devices you published for. You ought to be able to add this as an entry there:

<key>NSCalendarsUsageDescription</key><string>Guitar Scales uses your calendar to book your next gig.</string>

One difficulty is that Animate wipes out that setting when you go into publish settings. A way around that is to only add the extra text to the XML at the end, and then do a Publish from the File menu. Don't go back into publishing settings, it will erase your changes to the XML.

I just tested it, and info.plist did have a NSCalendarsUsageDescription key, and the text was set to "Guitar Scales uses your calendar to book your next gig."

Now, if you can't think of a reason why your app would be accessing the calendar, then look at any ANEs you are using, and think about whether they might have a reason to look at the calendar. If you can think of a reason, then describe it in that string.