Hi
By googling the error message, that appears to be a common Apple issue.
Couple of suggestion are to check the iOS console (see KB below) or check if there is any conflict MDM profile already installed on the device (Systems > General > Device Management):
https://centrify.force.com/support/Article/KB-4992-How-to-collect-console-logs-for-iOS-devices
Thank you.
Best Regards,
Henry