Hello Carter and welcome to the Autodesk Community!
Please try these solutions to help resolve your blank activation issue:
I hope that one of these solutions works for you! If not, please respond to this post with further details.
I understand your frustration and I apologize that the activation process has been difficult. We continue to re-use solutions from previous years as they remain as solutions and continue to assist others with the same issue.
This solution has also been popular amongst users. It was embedded in one of the other threads but I do want to be thorough.
Out of all of the material that you have read and I have provided what exactly have you done to troubleshoot? Have you tried a good old fashioned uninstall and reinstall? It would be helpful to know so we can move forward.
Thank you for working with us to resolve this issue.
Thank you for the additional information and we appreciate that you have completed much of the troubleshooting. But I must recommend that you try rolling back your Internet Explorer to version 8.
We are aware that this is not ideal and truly is an inconvenience but after you get your activation processed you will be able to revert back to the Internet Explorer 11.