我正在使用flutter_pubnub：^ 0.2.0
Crashlytics错误日志
Fatal Exception: java.lang.NullPointerException: throw with null exception
at com.pubnub.api.models.server.SubscribeMetadata.getTimetoken(SubscribeMetadata.java:3)
at com.pubnub.api.managers.SubscriptionManager$5.a(SubscriptionManager.java:201)
at com.pubnub.api.managers.SubscriptionManager$5.a(SubscriptionManager.java:2)
at com.pubnub.api.endpoints.Endpoint$1.a(Endpoint.java:45)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:37)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:201)
at android.app.ActivityThread.main(ActivityThread.java:6810)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
在调试模式下正常工作