IOS build or Xcode error: ld: 14 duplicate symbols for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

This is caused due to conflict between two plugins

Run the next command:

cordova plugin list

Our result is:

call-number 0.0.2 "Cordova Call Number Plugin"
com-badrit-base64 0.2.0 "Base64"
cordova-android-support-gradle-release 3.0.1 "cordova-android-support-gradle-release"
cordova-plugin-actionsheet 2.3.3 "ActionSheet"
cordova-plugin-add-swift-support 1.7.2 "AddSwiftSupport"
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-dialogs 2.0.1 "Notification"
cordova-plugin-file 6.0.1 "File"
cordova-plugin-file-transfer 1.7.1 "File Transfer"
cordova-plugin-geolocation 4.0.1 "Geolocation"
cordova-plugin-inappbrowser 3.2.0 "InAppBrowser"
cordova-plugin-ionic-keyboard 2.1.3 "cordova-plugin-ionic-keyboard"
cordova-plugin-ionic-webview 4.1.3 "cordova-plugin-ionic-webview"
cordova-plugin-nativegeocoder 3.2.1 "NativeGeocoder"
cordova-plugin-nativestorage 2.3.2 "NativeStorage"
cordova-plugin-splashscreen 5.0.2 "Splashscreen"
cordova-plugin-statusbar 2.4.2 "StatusBar"
cordova-plugin-telerik-imagepicker 2.2.4 "ImagePicker"
cordova-plugin-whitelist 1.3.3 "Whitelist"
cordova-plugin-x-socialsharing 5.4.4 "SocialSharing"
es6-promise-plugin 4.2.2 "Promise"
uk.co.workingedge.phonegap.plugin.launchnavigator 5.0.4 "Launch Navigator"

Every plugin not covered by this list should be removed by

ionic cordova remove plugin-name

The two plugins causing the problems are cordova-plugin-wkwebview-engine and one signal-cordova-plugin be sure also your plugins versions are the same as our ones. if not please remove that plugin and then run:

ionic cordova install plugin-name@latest

When you are done with the plugins versions please confirm the changes running:

ionic cordova platform remove ios
ionic cordova platform add ios@latest