Why is 'Error fetching invite details: Invite doesn't exist' displayed while accepting a family account invite?

This error is displayed for the following reasons:

• If another account is logged in: The error occurs when accepting an invitation using a different account, such as the main account instead of a sub-account. Invites should only be accepted from a sub-account for which the details are entered.
• When the invite is deleted: The error is displayed when the client tries to accept an invite, but the invite has already been deleted from the parent account. In this scenario, the parent account holder must re-enter the sub-account details on Console. To learn more see, How to add family members to a Zerodha account?
• Accepting an invite after 2 hours: The invite link is valid only for 2 hours. After 2 hours, the parent account holder must delete the existing request and re-enter the sub-account details on Console.