When starting eMClient i get always an error

18:38:30  
MailClient.Storage.Application.OperationException: Het uploaden van item(s) naar map ‘name…@gmail.com/Contacts/’ is mislukt met de volgende foutmelding: Execution of request failed:https://www.google.com/m8/feeds/contacts/name…@gmail.com/full/791d321788e98994([Line 9, Column 31, element gd:email] g:email/@address is required)