Volodymyr Buberenko

Thanks to info provided by Sebastian Schneider I was able to find a solution to this crash.

So, to anyone still having this crash add this rule to your proguard-rules file:

-keep class org.xmlpull.** { *; }

I can confirm that the issue exists in Support SDK 5.2.0 when build in release mode even when have recommended rules as the original issue reporter mentions. The problem is in R8 optimisations (replacement for ProGuard in Android apps enabled by default for some time already) optimisations which might too aggressive for Zendesk's Support SDK.

In the sample app for some reason you have minification disabled, which is not an option for most projects: https://github.com/zendesk/android_sdk_demo_apps/blob/master/support_sample/build.gradle#L21

There is work to do for Zendesk developers to update the recommended set of rules for ProGuard (R8 uses same config file with rules).