"Please reinstall iTunes."
That's what I get for testing my coworker's repackaging of iTunes 12.7; I'd had 12.6.2.
I suspect trouble was had using composer and they just put the iTunes.app into Casper Admin.
I thought I'd make a mention of this issue here because googling the subject phrase merits two results which both suggest the quoted line above. While that may be an option for me, were this to have been deployed across my fleet that would not be viable and someone would be scrambling to determine a remedial package to mitigate this symptom.