Android Java/Kotlin

  You can add below 2 lines into your   gradle.properties   file: android.useAndroidX=true android.enableJetifier=true Note  to check, to not repeat any line that already exists (and ensure existing are  true ). Details: Your project (or one of its sub-projects, or a dependency) is no longer using  android.support  libraries and instead is using  androidx  libraries, which causes conflicts if mixed with  android.support  libraries. If you want to use  androidx -namespaced libraries in an old project, you need to set the compile SDK to Android 9.0 (API level 28) or higher but below "API level 31", and set both of the mentioned Android Gradle plugin flags to  true . android.useAndroidX : When this flag is set to  true , the Android plugin uses the appropriate AndroidX library instead of a Support Library. The flag is  false  by default if it is not specified. android.enableJetifier : When this flag is set to...