Error messge on starting EMclient

Following error message appears each time I start EMclient. No idea what it means or how to resolve
'[Google Contacts]Uploading item(s) to folder ‘’ failed due to the following error: Can not remove all contact group memberships. Contact must always be in at least one contact group/.

The easiest way to resolve this is to:

  1. Make a backup using Menu > Backup

  2. Go to Menu > Accounts and remove the Gmail account, then add it back again.

Thanks Gary, worked a treat.