I sent out an invitation with 2 buttons to accept or decline.
When someone chooses to decline, the decline landing page come up. The person proceeds to enter their email address, the reason they are declining and then clicks the 'Decline' button. An error comes up that says, An invitation has not been sent to this email address, in red. But an invitation was sent to their email. This has happened 3 times now.
Thank you for reaching out to the Community! I'm sorry to hear about the issue you are experiencing with the decline page on your event. Please email us at social_support(at)constantcontact(dot)com with your username, the contacts who have experienced this, and a reference to this post and we will investigate further for you!