Error when generating signed APK in Android Studio

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Warning:retrofit2.-KotlinExtensions: can’t find referenced class org.jetbrains.annotations.NotNull

Does anyone know how to solve this?

2 Answers

Add this in your ProGuard

-keep class org.jetbrains.annotations.** { *; }
-dontwarn org.jetbrains.annotations.**

The warning appeared also on my side after I've updated the buildToolsVersion from 28.0.3 to 29.0.0.

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