Ionic v5. iOS platform. Could not signal service com.apple.WebKit.WebContent: 113.

Good day ! Could anyone suggest please .. Ioinc 5 app crashed on iOS platform when I am downloaded a lot of files from server by angular HttpRequest ... The mobile app is working fine on Android 9,10.

**Error...**

**2021-02-01 17:30:05.904879+0200 Parts[1305:358229] Could not signal service com.apple.WebKit.WebContent: 113: Could not find specified service**

Installed platforms **ios 6.1.1**,

`add to config.xml preference name="WKWebViewOnly" value="true"`

Tested on iOS version ipad **12.5.1** and iphone **14.4**

**ionic info:**

```
Ionic:

Ionic CLI : 5.4.16 (/usr/local/lib/node_modules/ionic)
Ionic Framework : @ionic/angular 5.5.2
@angular-devkit/build-angular : 0.1000.8
@angular-devkit/schematics : 10.0.8
@angular/cli : 10.0.8
@ionic/angular-toolkit : 2.3.3

Cordova:

Cordova CLI : 10.0.0
Cordova Platforms : none
Cordova Plugins : no whitelisted plugins (0 plugins total)

Utility:

cordova-res : not installed
native-run : not installed

System:

ios-deploy : 1.11.3
ios-sim : 8.0.2
NodeJS : v14.15.4 (/usr/local/bin/node)
npm : 6.14.10
OS : macOS Big Sur
Xcode : Xcode 12.4 Build version 12D4e
```

**Plugin list:**

```
com-sarriaroman-photoviewer 1.2.4 "PhotoViewer"
cordova-clipboard 1.3.0 "Clipboard"
cordova-plugin-advanced-http 3.1.0 "Advanced HTTP plugin"
cordova-plugin-android-permissions 1.1.2 "Permissions"
cordova-plugin-app-version 0.1.12 "AppVersion"
cordova-plugin-background-mode 0.7.3 "BackgroundMode"
cordova-plugin-badge 0.8.8 "Badge"
cordova-plugin-compat 1.2.0 "Compat"
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-file-opener2 3.0.5 "File Opener2"
cordova-plugin-file-transfer 2.0.0-dev "File Transfer"
cordova-plugin-file 6.0.2 "File"
cordova-plugin-inappbrowser 4.1.0 "InAppBrowser"
cordova-plugin-ionic-keyboard 2.2.0 "cordova-plugin-ionic-keyboard"
cordova-plugin-ionic-webview 4.2.1 "cordova-plugin-ionic-webview"
cordova-plugin-local-notification 0.9.0-beta.2 "LocalNotification"
cordova-plugin-ms-adal 0.8.1 "ADAL for Cordova"
cordova-plugin-nativestorage 2.3.2 "NativeStorage"
cordova-plugin-network-information 2.0.2 "Network Information"
cordova-plugin-printer 0.8.0 "Printer"
cordova-plugin-screen-orientation 3.0.2 "Screen Orientation"
cordova-plugin-splashscreen 5.0.2 "Splashscreen"
cordova-plugin-statusbar 2.4.2 "StatusBar"
cordova-plugin-vibration 3.1.1 "Vibration"
cordova-plugin-whitelist 1.3.3 "Whitelist"
cordova-plugin-wkwebview-engine 1.2.2-dev "Cordova WKWebView Engine"
cordova-plugin-wkwebviewxhrfix 1.0.0 "Cordova WKWebView File XHR Fix"
cordova-plugin-zip 3.1.0 "cordova-plugin-zip"
cordova-sqlite-storage 5.1.1-dev "Cordova sqlite storage plugin - cordova-sqlite-storage plugin version"
cordova.plugins.diagnostic 6.0.3 "Diagnostic"
```