I have figured out what to do about the 404. Your link consists of the address of a Google+ post, followed by ? and some parameters which are your unique invit

I have figured out what to do about the 404. Your link consists of the address of a Google+ post, followed by ? and some parameters which are your unique invite id. For some reason the post does not resolve, but the invite is good. So keep the invite ID, but replace the main URL with https://plus.google.com/107117483540235115863/posts/PhJFJqLyRnm https://plus.google.com/107117483540235115863/posts/PhJFJqLy... which is the address of Vic Gundotra's much-quoted post about shutting down invites for the night.