Scraping Text from secure web page? (C#)

Question

Basically the site I am trying to scrape text from is secure and only accessible to those on what i can assume is the VPN the organization has set.

When I was testing my tool today, while connected to the network at this place, on a computer that can access this site, it was not allowing the tool to access it. I am wondering if maybe there's something im missing that someone can tell me.

Below I have attached my entire source code. For context and a better understanding, the fields for "Demo Results" are just to test on any site. Currently i have it so that i can paste whatever xPath and URL i please in a textbox. This will be changed later and set to a specific URL and xPath. I am using HTMLAgilityPack as you might see. This works when i use it on any site that is accessible to the public. But when it comes to this specific site, I get an error that the object is not set to an instance of an object. The site works 100% fine in the web browser.

namespace ToolConcept
{
    public partial class Form1 : Form
    {
        public string Results1;
        public string Results2;
        public string DemoResults;


        public Form1()
        {
            InitializeComponent();


            DemoResults = "";
            Results1 = "YOUR RESULTS HERE";
            Results2 = "RESULTS SHOWN HERE!";
        }
        public void Scrape(string args)
        {
            HtmlAgilityPack.HtmlWeb web = new HtmlAgilityPack.HtmlWeb();
            HtmlAgilityPack.HtmlDocument doc = web.Load(urlField.Text);
            foreach(var item in doc.DocumentNode.SelectNodes(pathField.Text))
            {
                DemoResults = item.InnerText;
            }

        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "R1")
            {
                textBox2.Text = Results1;
            }
            else if (textBox1.Text == "R2")
            {
                textBox2.Text = Results1 + Results2;
            }
            else if (textBox1.Text == "0")
            {
                Scrape(DemoResults);
                HtmlAgilityPack.HtmlWeb search = new HtmlAgilityPack.HtmlWeb();

                textBox2.Text = DemoResults;
            }
            if(textBox1.Text == null)
            {
                MessageBox.Show("Not Found!");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox2.Clear();
        }
    }
}