The invitation link says it's used or expired

The page says "This invitation is not open" and one line under it. Each line has its own fix:

• "This invitation has expired." A link works for 7 days. Ask your admin to send you a new one.
• "This invitation has already been used." If you set your password from it, sign in instead. See How do I sign in?. If not, ask your admin for a new one.
• "Somebody already took this seat." Ask your admin for a new invitation.
• "This seat has been closed." Ask your admin about it.
• "This invitation link does not open anything." Check you opened the whole link from the email, then ask your admin for a new one.

For the admin

On Team, open the seat and press Copy invite link. It makes a fresh link that works once and for 7 days, and the older link stops working. Send it to the person yourself. See Taking an invitation back, or copying the link.