Uploading item(s) to folder 'Gmail/Contacts/' failed

Any thoughts on what or why I’ve started getting the following message?

OperationException: Uploading item(s) to folder ‘Gmail/Contacts/’ failed with an error: Execution of request failed: https://www.google.com/m8/feeds/group… (Entry does not have any fields set)

Now solved:
Closed em client
Used Gmail web interface to export contacts.
Deleted contacts from gmail web and em client
Closed em client.
Imported gmail contacts using web interface.
Re started em client
No error message!

Great - thank you for the info!

LOG ERROR SHOWED:
Your client does not have permission to get URL ``` /m8/feeds/groups/<<username_email>>/full

 from this server.
<br><br>
MailExceptions.OperationException: Synchronizing folder 'Google Calendar/Contacts/' failed with an error: Execution of request failed: <a href="https://www.google.com/m8/feeds/groups/&lt;&gt;//full?max-results=214457855" rel="nofollow">https://www.google.com/m8/feeds/group...</a>
<br><br>
SOLUTION
<br>
After searching the Internet, found that the issue is caused from using a different username/email address than your Gmail account (ie using <a href="mailto:[email protected]" rel="nofollow">[email protected]</a> instead of <a href="mailto:[email protected]" rel="nofollow">[email protected]</a>). Gmail allows you to log into the website using different email address. However, the API used in emClient for Calendar/Contacts does not. you need to use the Gmail email address as your username. I changed the username to my google/gmail email address and all is resolved. Hope that helps.<br><br>
</username_email>

Hi, I have replied to you here already https://discourse.emclient.com/emclient/to…

Please do not spam one post multiple times and also use only corresponding topics, if you are unable to find one then create a new.

Thank you for your understanding and cooperation.

Jan