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java.lang.NullPointerException: 	at okhttp3.HttpUrl.canonicalize(HttpUrl.java:1612)	at okhttp3.FormBody$Builder.add(FormBody.java:110)	at mobi.gaurav.telx.HTTP.post(HTTP.java:82)	at mobi.gaurav.telx.MainActivity.startConnecting(MainActivity.java:358)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:525)	at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)	at android.view.View.performClick(View.java:4212)	at android.view.View$PerformClick.run(View.java:17476)	at android.os.Handler.handleCallback(Handler.java:800)	at android.os.Handler.dispatchMessage(Handler.java:100)	at android.os.Looper.loop(Looper.java:194)	at android.app.ActivityThread.main(ActivityThread.java:5371)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:525)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)	at dalvik.system.NativeStart.main(Native Method)