A user tried to use Remote Assistance and send an invitation for help through their default e-mail client, but Remote Assistance ...

A user tried to use Remote Assistance and send an invitation for help through their default e-mail client, but Remote Assistance failed to successfully send the invitation.  It is possible the e-mail client configured as the default client does not support SMAPI calls, or that the e-mail client is improperly configured.  It is also possible that the user closed the e-mail client without sending the message.