TypeError: undefined is not an object (evaluating 'cordova.exec.jsToNativeModes.IFRAME_NAV')

processMessage failed: invalid message: ""

var ip="xxx.xxx.xxx.xx";
var port=":4567";
var authHeader;
var app={
    Login: function () {
        var username = document.getElementById("username").value;
        var password = document.getElementById("password").value;
        authHeader = cordovaHTTP.getBasicAuthHeader(username, password);
        app.httpPostLogin("/login");
    },

    httpPostLogin: function (route) {
        var url = "http://" + ip + port + route;
        // Send the post request (basically copied from the example on
        // https://github.com/wymsee/cordova-HTTP)
        cordovaHTTP.post(url, null, authHeader,
            function (response) {
            // prints 200
            console.log(response.status);
            try {
                response.data = JSON.parse(response.data);
                // prints test
                console.log(response.data.message);
            } catch (e) {
                console.error("JSON parsing error");
            }
        }, function (response) {
            // prints 403
            console.log(response.status);

            //prints Permission denied
            console.log(response.error);
        });
    },
}

macOS High Sierra 10.13.3
Cordova 7.1.0
cordova-plugin-http 1.2.0