I am getting the following type of error when I am building the app for ios. What's surprising is that the android app is getting built perfectly with the same config.
"Error - The following 3rd-party plugin is causing the build to fail and may need to be updated to a newer version: com.phonegap.plugins.PushPlugin"
Include in your config.xml file as:
<preference name="android-build-tool" value="gradle" />
<plugin name="phonegap-plugin-push" source="npm">
<param name="SENDER_ID" value="<Your Sender ID>" />