If you have an Autodesk product installed on your PC it may have installed an Internet Explorer addon called "dwgviewrCtrl". This addon is notorious for breaking the viewing of CAD files on websites. The only fix is to edit your registry or uninstall your Autodesk product. That is not recommended.
We recommend the following method to view our dwg files if you are getting the blank page issue.
Other browsers will either ask you to save or open the file instead of getting the blank white page.