If the pattern had been free I would have tried it, but I dont really want to pay 100 coins to find out. Once I have paid the coins for patterns, I have to refresh my screen before I can download, but I think you have done that already.
I have just paid the gold coins and attempted downloading to see if I have the same issue as you. I also get a timeout error, and the page says it is a host side error and not an end user error. Although, Ive downloaded a few other patterns this week and not had any issues.