Exception during Export to PDF: Failed to add HTML: Gecko engine crashed.

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C#

C#4.0

I am getting exception at server having abcpdf .net version 8.101 installed full vesrsion
This is the code that generate PDF from Html i.e url pdfSourceURL

I am getting 2 errors in the log file at he server
-Exception during Export to PDF: Failed to add HTML: Page load timed out.
-Exception during Export to PDF: Failed to add HTML: Gecko engine crashed.

Below is the code snippet

Logs.Write("Start Genrating PDf for : " + pdfSourceURL);
                string fileName = GetFileName(TargetFolderPath, TargetFilename);
                Doc theDoc = new Doc();
                theDoc.HtmlOptions.AddLinks = true;
                theDoc.HtmlOptions.Engine = EngineType.Gecko;
                theDoc.Rect.Inset(40, 40);

                int theID;
                theID = theDoc.AddImageUrl(pdfSourceURL);
                while (true)
                {
                    theDoc.FrameRect();
                    if (!theDoc.Chainable(theID))
                        break;
                    theDoc.Page = theDoc.AddPage();
                    theID = theDoc.AddImageToChain(theID);
                }
                for (int i = 1; i <= theDoc.PageCount; i++)
                {
                    theDoc.PageNumber = i;
                    theDoc.Flatten();
                }

                if (!Directory.Exists(TargetFolderPath))
                    Directory.CreateDirectory(TargetFolderPath);
                theDoc.Save(Path.Combine(TargetFolderPath, fileName));
                Logs.Write("PDf is Genrated for : " + pdfSourceURL);
                Logs.Write("PDF Saved in the folder : " + TargetFolderPath);
                theDoc.Clear();

Please help!