B4J Question Error on jOkHttpUtils2(2.92)

    Dim su As StringUtils
    Dim url As String="https://myurl/ws"
    Dim usr As String=su.EncodeBase64("CREDENTIALS".GetBytes("UTF8"))
    Dim aut As String=$"AuthString"$
    Dim j As HttpJob
    j.Initialize("",Me )
    j.GetRequest.SetHeader("Authorization",aut)
    j.GetRequest.SetContentType("application/json")
    j.PostString(url,usr)
    Wait For(j) JobDone(j As HttpJob)
    If j.Success Then
        Log(j.GetString)
    Else
        Log(j.ErrorMessage)
    End If
    j.Release

Waiting for debugger to connect...
Program started.
Error occurred on line: 244 (HttpJob)
java.lang.NullPointerException
at anywheresoftware.b4h.okhttp.OkHttpClientWrapper$OkHttpRequest.SetHeader(OkHttpClientWrapper.java:470)
at b4j.example.main$ResumableSub_AppStart.resume(main.java:134)
at b4j.example.main._appstart(main.java:79)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:632)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:237)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:91)
at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:98)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:78)
at b4j.example.main.start(main.java:38)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:186)
at java.lang.Thread.run(Thread.java:748)

Click to expand...

function send_local(){       
    var url = "https://myurl/ws"
    var cr = "CREDENTIALS";   
    var cr64 = btoa(cr);
    var auth = "authString";   
    var req = new XMLHttpRequest();   
    req.onreadystatechange = function() {
        if (this.readyState === 4 && this.status === 200) {
            console.log(req.responseText);           
        }else{
            console.log(req);
        }
    };   
    req.open("POST", url, true);   
    req.setRequestHeader('Authorization',auth);
    req.setRequestHeader('Content-Type','application/json; charset=utf-8');