Thank you for your patience. We have investigated the issue in details using the latest version of Sitefinity i.e. 7.0.5100.0.
- The blank page is most likely due to PDF integration with the browser. We tested export to PDF with latest version of IE, Chrome and FireFox and found it working in all. Can you please try a different browser and also please tell us which browser and version you are using.
- We were unable to produce the error you mentioned even when tested upto 3 levels of sub-pages, with and without port based URLs and with a sub-domain URL but the error details suggest that the error is occurring when the code tries to fetch HTML of the current page using dynamically generated URL. Can you please tell us the exact URL which is giving you the error? We will then setup the exact same URL to test this scenario.
We look forward to hear your feedback and hope to resolve the issues you are facing very soon.