There is an error message in my program, how can I solve it.
The following error message occurred: The error position is in the sixth column.
B4X:
'Reference: HTTP & HttpUtils2 Library
Dim http As HttpJob
Dim url As String
url = "https://notify-api.line.me/api/notify"
http.Initialize("",Me)
http.GetRequest.SetHeader("Authorization", "Bearer ZOWe17zgDOzPCwcgBvugMg4ADFeLKenIj7zmJP9MTYs")
http.GetRequest.SetContentType("application/x-www-form-urlencoded")
http.PostString(url,"message=Hollo!")
b4x]main_qr_result_found (java line: 518)
java.lang.NullPointerException: Attempt to invoke virtual method 'void org.apache.http.message.AbstractHttpMessage.setHeader(java.lang.String, java.lang.String)' on a null object reference
at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.SetHeader(HttpClientWrapper.java:449)
at JHS.QRCodeReaderView.main._qr_result_found(main.java:518)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:196)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:180)
at qrcodereaderviewwrapper.qrCodeReaderViewWrapper$1.result_found(qrCodeReaderViewWrapper.java:103)
at com.dlazaro66.qrcodereaderview.QRCodeReaderView.invokeResultFound(QRCodeReaderView.java:272)
at com.dlazaro66.qrcodereaderview.QRCodeReaderView.onPreviewFrame(QRCodeReaderView.java:153)
at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1263)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:169)
at android.app.ActivityThread.main(ActivityThread.java:6578)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
java.lang.NullPointerException: Attempt to invoke virtual method 'void org.apache.http.message.AbstractHttpMessage.setHeader(java.lang.String, java.lang.String)' on a null object reference