Did you get a page of a melted ice cream image?
If so, this is a temporary server-side issue. It doesn't mean the key is not saved - that we won't know for sure until the page loads. I am seeing quite a few other users from different locales reporting the same issue during the last hour or so. This has happened in the past more than once, and it was always on server side and was temporary. Hopefully it will resolve itself soon.