I've come across a lot of issues in the challenges even with the updated version. It's the games problem not ours. Hope this helps!

I used a filter to narrow down the dresses to green and blue. Then I looked at the info on each dress to find one that had both green and blue in it. Just hit the tiny i in the top right corner. The dress I found is really cheap and takes 1 hour 45 min to create. Sorry I don't have the name for you!