java.lang.NullPointerException: Attempt to invoke virtual method 'com.quickblox.core.QBRequestCanceler com.quickblox.chat.QBPrivateChatManager.createDialog(int, com.quickblox.core.QBEntityCallback)' on a null object reference

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Attempt to invoke virtual method 'com.quickblox.core.QBRequestCanceler com.quickblox.chat.QBPrivateChatManager.createDialog(int, com.quickblox.core.QBEntityCallback)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'com.quickblox.core.QBRequestCanceler com.quickblox.chat.QBPrivateChatManager.createDialog(int, com.quickblox.core.QBEntityCallback)' on a null object reference
at com.archi.intrisfeed.fragment.ChattingFragment$3.onSuccess(ChattingFragment.java:102)
at com.archi.intrisfeed.fragment.ChattingFragment$3.onSuccess(ChattingFragment.java:96)
at com.quickblox.core.Query.notifySuccess(Query.java:372)
at com.quickblox.core.Query$VersionEntityCallback.completedWithResponse(Query.java:404)
at com.quickblox.core.Query.completedWithResponse(Query.java:277)
at com.quickblox.core.server.HttpRequestRunnable$1.handleMessage(HttpRequestRunnable.java:42)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)

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