My request did not arrive

The chat says where your request is:

• "Request sent.": you sent it. The chat then shows how far it got.
• "Not sent yet": our server does not have it yet. KUVRT keeps trying.
• "Waiting for Anna to accept your request.": it arrived, and they have not accepted yet.
• "This invite link no longer works. Ask Anna for a new one.": the link was replaced. "Delete chat and contact" clears the chat.
• "You already chat with this person.": the link is of someone in your list.
• "That invite code is not valid any more.": a code works for ten minutes. Ask for a new one.

Still nothing? They may be looking in another browser, or in KUVRT in Safari instead of the app. Ask which one they use, and for a fresh link.