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I am in the process of (learning) writing Xcode (11.4.1) / Swift 5 and trying to open BlackBerry UEM Client App in my test code on iPhone XR. Here is the code in Swift-The following is in the CodeViewController.swift:The info.plist has a new addition of “LSApplicationQueriesSchemes with “UEM Client” as Item 0 in its defined Array// --------------------------1. Import UIKit2. Import AVFoundation3. Import LocalAuthentication4. Class CodeViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {5. .6. .7. .8. Override func viewDidLoad() {9. Super.viewDidLoad()10. }11. .12. .13. .14. @IBAction func executeTestCase(_ sender: any) {15. let application = UIApplication.shared16. let uemClientPath = "UEM Client://"17. let appUrl = URL(string: uemClientPath)!18. if application.canOpenURL(appUrl) {19. application.open(appUrl, options: {:}, completionHandler: nil)20. print(" Opened UEM Client App")21. } else {22. print("Can't open UEM Client App on the iPhone")23. }24. .25. .26. .27. }// --------------------------The iPhone is connected to the Apple laptop. Upon compilation, the app is executed automatically on the iPhone and it crashes at line # 17 with the following –Fatal error: Unexpectedly found nil while unwrapping an Optional value: file /Users/wamiqsattar/……/CodeViewController.swift, line 17On line # 16, "UEM Client://", should not have a space. However, I do not know what the client path and/or the URL should be for the (BlackBerry) UEM Client app on the iPhone Xr. Can any of you please give me a viable advice on this Xcode/Swift Coding? What I am missing or what I need to do. I am guessing the (BlackBerry) UEM Client app has to have a special “client path”. Thank you.Regards,Wamiq