Sometimes when I get that no snapshot was found the Wayback Machine offers me to save the page.
In this case, I just got the message: "Wayback Machine doesn't have that page archived. Want to search for all archived pages under..."
If you want the current version of that page to be archived, you can do it also by entering the url with "save" in the browser - like this: http://web.archive.org/save/https://math.stackexchange.com/users/486983/user486983.
That saves how the page looks now - of course, if you wanted to find some older version, this does not help you with that.