After the most recent update (Xamarin.Android.Support libraries, V28.0.0, Build tools 27.0.3), every build is failing with
"java.exe" exited with Code 2
I had previously enabled Multi-Dex to get rid of this issue, and that has worked without a problem until now. I also tried re-enabling ProGuard, and following all of the steps from this answer, including the change to MainDexClasses.bat.
There are a couple of new warnings, but I haven't been able to work out whether or not they are causing the new problem:
CREATEMULTIDEXMAINDEXCLASSLIST: warning : can't write resource [META-INF/maven/com.squareup.okio/okio/pom.xml] (Duplicate zip entry [okio.jar:META-INF/maven/com.squareup.okio/okio/pom.xml])
CREATEMULTIDEXMAINDEXCLASSLIST: warning : can't write resource [META-INF/maven/com.squareup.okio/okio/pom.properties] (Duplicate zip entry [okio.jar:META-INF/maven/com.squareup.okio/okio/pom.properties])