Android Api 19 Initializer Error

Smack Smack Support
3

If I disable ProGuard/R8’s minification feature the problem only disappear in android versions upper than 19. In api version 19, the problem still occurs.

This is my proguard rules for this project:

-keep class org.jivesoftware.smack.initializer.VmArgInitializer
-keep class org.jivesoftware.** { *;}
-keepclassmembers enum * {*;}