使用JQM和AJAX进行Parseerror

Question

I'm using AJAX to save data in a jquery mobileproject. I´m using the below code and the data gets saved, but for some reason I do get parseerror in concole and Error #2 alert is thrown. However the other one , alert(data['error']); just print out some actual jquery code?

        $("#submit").click(function(){
        var formData = $("#event_form").serialize();
            $.ajax({
                type: "POST",
                url: "include/handler/create.ajax.php",
                cache: false,
                data: formData,
                success:function(data){
                    if(data['error']){
                        alert('Error #1');
                        alert(data['error']);
                    }else{
                        alert('Success');
                        alert(data['success']);
                        $('#event_form').trigger("reset");
                    }
                },
                error: function(data, errorThrown){
                    alert('Error #2');
                    alert(data['error']);
                    console.log(errorThrown);
                }
            });
        return false;
    });

In the AJAX handler I return message by:

$msg = array("error"=>"Technical error");
echo json_encode($msg);
die;