Build failed with kotlin

[lixinwei67]

Hi
I'm building Android project with joynr, but there is something wrong.
joynrVersion:1.19.4
kotlinVersion:1.5.20
gradle-build-tools:7.0.4

When I using kotlin file extends XXXAbstractProvider, I will got an error when building the project
Cannot access 'joynr.xxx.XXXSubscriptionPublisherInjection' which is a supertype of 'com.xxx.xxxx.XXXProvider'. Check your module classpath for missing or conflicting dependencies
But if I using Java file to extends XXXAbstractProvider, it can build success.

Hope for some help