JavaxPorts jfxmobile-plugin: Failure if classes more than 65535 - javafxports

Question

When I do a
gradle android
with the jfxmobile-plugin on my JavaFX-application I get
...
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':mergeClassesIntoJar'.
> archive contains more than 65535 entries.
To build this archive, please enable the zip64 extension.
See: https://docs.gradle.org/3.2.1/dsl/org.gradle.api.tasks.bundling.Zip.html#org.gradle.api.tasks.bundling.Zip:zip64
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
The gradle file looks like this:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.javafxports:jfxmobile-plugin:1.3.2'
}
}
apply plugin: 'org.javafxports.jfxmobile'
mainClassName = 'de.package.of.application.ClientApp'
dependencies {
compile 'com.annimon:stream:1.0.1'
compile 'com.jakewharton.threetenabp:threetenabp:1.0.4'
compile 'com.gluonhq:charm:3.0.0'
androidRuntime 'com.gluonhq:charm-android:3.0.0'
iosRuntime 'com.gluonhq:charm-ios:3.0.0'
desktopRuntime 'com.gluonhq:charm-desktop:3.0.0'
compile fileTree(dir: 'target/dependencies', include: '*.jar')
runtime fileTree(dir: 'target/dependencies', include: '*.jar')
}
repositories {
jcenter()
maven {
url 'http://nexus.gluonhq.com/nexus/content/repositories/releases'
}
}
jfxmobile {
ios {
forceLinkClasses = ['ensemble.**.*']
}
android {
applicationPackage = 'org.javafxports.ensemble'
compileSdkVersion = '21'
androidSdk='C:/Tools/android-sdk-windows'
}
}
Over the last years since Javafx exists the application has become, I would say, a 'bigger' one; a fat-client with many own classes but also many third-party dependencies.
I found an article about the jfxmobile-plugin and thought 'Why not give it a try?'. The current issue is the one described in this question.
I already stripped down the application to reduce classes to a minimum so the application still makes some sense in some way but it does not help.
Does anyone have a suggestions how to solve it?