title: Process kill() returned unexpected error 1 Xcode 11.2 - iOS 13.2 - Swift 5
body: <p><strong>Text translated by google</strong></p>
  
  <p>I am using a webview and when I upload the data to the webview it shows me these messages. What should I modify, is it a mistake, can it cause problems for my application?</p>
  
  <pre class="lang-swift prettyprint-override"><code>import UIKit
  import WebKit
  
  class BeneficiosViewController: UIViewController , WKNavigationDelegate{
  
      // MARK: - Declarando Variables
      var webView: WKWebView!
  
      // MARK: - LOAD
      override func viewDidLoad() {
          super.viewDidLoad()
  
      self.title = "Beneficios"
      self.navigationController?.navigationBar.titleTextAttributes=[NSAttributedString.Key.font: UIFont(name: "carnas", size: 22) as Any]
  
          let url = URL(string: "https://www.sites.google.com/pageweb")
              webView.load(URLRequest(url: url!))
          webView.addObserver(self, forKeyPath: #keyPath(WKWebView.estimatedProgress), options: .new, context: nil)
  
              webView.allowsBackForwardNavigationGestures = true
  
      }
      // MARK: - Funcion para cargar una web
      override func loadView(){
          webView = WKWebView()
          webView.navigationDelegate = self
          view = webView
      }
      override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
          if keyPath == "......."{
              print(Float(webView.estimatedProgress))
          }
      }
  }
  </code></pre>
  
  <p>Log Detail:</p>
  
  <pre><code>2019-11-22 09:02:25.003545-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.003696-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.004011-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.004173-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.004466-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.004614-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.004820-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  2019-11-22 09:02:25.004965-0500 ScharffDev[6600:1264134] [Process] kill() returned unexpected error 1
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/DrOFT.png" alt="Error image"></p>