Could not find gradle wrapper within Android SDK. Might need to update your Android SDK - ionic-v3 - Ionic Forum
GitHub - gradle/wrapper-upgrade-gradle-plugin: Gradle plugin that detects and updates Gradle and Maven wrappers to the latest Gradle and Maven version .
Gradle Settings - IntelliJ IDEA Guide
How to change the version of the 'default gradle wrapper' in IntelliJ IDEA? - Stack Overflow