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com.google.gson.JsonObject cannot be cast to java.io.File
java.lang.ClassCastException: com.google.gson.JsonObject cannot be cast to java.io.File	at com.beust.kobalt.plugin.publish.RequestBodyConverter.convert(BintrayApi.kt:235)	at retrofit2.ParameterHandler$Body.apply(ParameterHandler.java:270)	at retrofit2.ServiceMethod.toRequest(ServiceMethod.java:108)	at retrofit2.OkHttpCall.createRawCall(OkHttpCall.java:178)	at retrofit2.OkHttpCall.execute(OkHttpCall.java:162)	at com.beust.kobalt.plugin.publish.BintrayApi.validatePackage(BintrayApi.kt:105)	at com.beust.kobalt.plugin.publish.BintrayApi.uploadMaven(BintrayApi.kt:127)	at com.beust.kobalt.plugin.publish.PublishPlugin.uploadBintray(PublishPlugin.kt:80)	at com.beust.kobalt.plugin.publish.PublishPlugin.taskUploadBintray(PublishPlugin.kt:62)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:497)	at com.beust.kobalt.internal.TaskManager$toTaskAnnotation$1.invoke(TaskManager.kt:401)	at com.beust.kobalt.internal.TaskManager$toTaskAnnotation$1.invoke(TaskManager.kt:19)	at com.beust.kobalt.internal.TaskManager$addTask$1.call(TaskManager.kt:475)	at com.beust.kobalt.internal.TaskManager$addTask$1.call(TaskManager.kt:473)	at com.beust.kobalt.internal.TaskWorker$call$$inlined$forEach$lambda$1.invoke(TaskManager.kt:514)	at com.beust.kobalt.internal.TaskWorker$call$$inlined$forEach$lambda$1.invoke(TaskManager.kt:500)	at com.beust.kobalt.misc.BenchmarksKt.benchmarkMillis(Benchmarks.kt:5)	at com.beust.kobalt.internal.TaskWorker.call(TaskManager.kt:513)	at com.beust.kobalt.internal.TaskWorker.call(TaskManager.kt:500)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)