iOS 12 iPad Denied Launch Request - Xcode

It took me three days to solve problem. I found two solutions. You can choose either of the two ways.

Solution 1:

Open System Preferences → Users & Groups → Add a user account (build with new user is successfully).

Solution 2: open Keychain Access -> choose System, All Items -> delete certificate Apple Worldwide Developer Relations Certification Authority.

Haozes: I fixed it by doing this:

1. Open Edit Scheme
2. Open Info tab
3. Executable then select Ask on launch 

Thank god!

Reference: https://forums.developer.apple.com/thread/86729#270356

In my case the developer account was not yet approved of on the iOS device. I had to do this manually in the Settings app:

• Open the Settings app
• Go to General
• Go to Profiles & Device Management
• Choose the profile in question and trust it