Stumbled upon this looking for a reason why my downloads aren't happening. Same thing happening here.. put in my serial - click download - then nothing happens and the download appears in my history. I've used Firefox, Safari and Firefox , Explorer on a VM with no luck and the same issue.
I've removed the pop up blocker on the Firefox and received
" Request Origin Error Please refresh the Extreme Networks DMS
product details page and click that link again.
If you still experience issues, please make sure to try an updated browser. For further assistance, contact firstname.lastname@example.org