致命exception:与Klaxon json Kotlin库的java.lang.RuntimeException

我用我的Android应用程序(proguard启用)与这个错误来与最新的Android版本8.0的klaxon。 任何想法是什么造成的

Fatal Exception: java.lang.RuntimeException Unexpected character at position 2: '< (60)' com.beust.klaxon.Parser.parse (Unknown Source:24) cc.cc.api.JsonParser$Companion.parse (Unknown Source:15) cc.cc.api.JsonParser$Companion$processResponse$1$2.onCompleted (Unknown Source:52) com.koushikdutta.async.future.SimpleFuture.getResultOrThrow (Unknown Source:10) com.koushikdutta.async.future.SimpleFuture.cancel (Unknown Source:22) com.koushikdutta.ion.IonRequestBuilder$EmitterTransform$1.onCompleted (Unknown Source:25) com.koushikdutta.async.future.SimpleFuture.getResultOrThrow (Unknown Source:10) com.koushikdutta.async.future.SimpleFuture.cancel (Unknown Source:22) com.koushikdutta.ion.IonRequestBuilder$1.run (Unknown Source:55) com.koushikdutta.async.AsyncServer$RunnableWrapper.run (Unknown Source:14) android.os.Handler.handleCallback (Handler.java:789) android.os.Handler.dispatchMessage (Handler.java:98) android.os.Looper.loop (Looper.java:164) android.app.ActivityThread.main (ActivityThread.java:6541) java.lang.reflect.Method.invoke (Method.java) com.android.internal.os.Zygote$MethodAndArgsCaller.run (Zygote.java:240) com.android.internal.os.ZygoteInit.main (ZygoteInit.java:767)