java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.String java.lang.String.toString()’ on a null object reference

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  • Android Volley Tutorial to Upload Image to Server
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    • java.lang.NullPointerException: Attempt to invoke virtual method ‘java.lang.String java.lang.String.toString()’ on a null object reference at com.example.dts.imageupload.MainActivity$2.onErrorResponse(MainActivity.java:97) at com.android.volley.Request.deliverError(Request.java:524) at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:101) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:139) at android.app.ActivityThread.main(ActivityThread.java:5298) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
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