Unable to download free Adobe XD Membership from Google

Hi, my name is Pedro. I earned a free 9-month membership to Adobe XD from Google, through Coursera. However, when i try to redeem the code through a message in Coursera, the page  of adobepartneroffer.com won't open. 

I would be very grateful if you could solve the problem, because i need this for the rest of the UX course.