Can not download file on dropbox

        private void UpdateWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            WebClient webClient = new WebClient();
            var client = new WebClient();
            try
            {
                System.Threading.Thread.Sleep(5000);
                File.Delete(@".\UniverseClient.exe");
                client.DownloadFile("https://www.dropbox.com/s/8jlvmbg68hr7ie1/UniverseClient.zip?dl=1", @"UniverseClient.zip");
                string zipPath = @".\UniverseClient.zip";
                string extractPath = @".\";
                ZipFile.ExtractToDirectory(zipPath, extractPath);
                File.Delete(@".\UniverseClient.zip");
                Process.Start(@".\UniverseClient.exe");
                this.Close();
            }
            catch
            {
                MessageBox.Show("Could not update the launcher, please download new version from the site or try again.", "Update Interrupted!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                Process.Start("UniverseClient.exe");
                this.Close();
            }
            for (int i = 0; i < 100; i++)
            {
                Thread.Sleep(1000);
                UpdateWorker.ReportProgress(i);
            }
        }

        private void UpdateWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            WebClient webClient = new WebClient();
            var client = new WebClient();
            try
            {
                System.Threading.Thread.Sleep(5000);
                File.Delete(@".\UniverseClient.exe");
                client.DownloadFile("https://www.dropbox.com/s/8jlvmbg68hr7ie1/UniverseClient.zip?dl=1", @"UniverseClient.zip");
                string zipPath = @".\UniverseClient.zip";
                string extractPath = @".\";
                ZipFile.ExtractToDirectory(zipPath, extractPath);
                File.Delete(@".\UniverseClient.zip");
                Process.Start(@".\UniverseClient.exe");
                this.Close();
            }
            catch
            {
                MessageBox.Show("Could not update the launcher, please download new version from the site or try again.", "Update Interrupted!", MessageBoxButtons.OK, MessageBoxIcon.Error);
                Process.Start("UniverseClient.exe");
                this.Close();
            }
            for (int i = 0; i < 100; i++)
            {
                Thread.Sleep(1000);
                UpdateWorker.ReportProgress(i);
            }
        }