I tried these steps with Legacy, 5.21 and 5.28. All doing the same thing. Worked fine for me last week.
All I get when trying to generate a link is:
I select the version of windows i need. Click "Confirm".
Validating your request..
Screen flashed and back to where I started. The version of windows i selected is still selected and the "Confirm" button is waiting again. I hit "Confirm: again. Same thing. Any suggestions?