Error message: Parameter validation failed

Hello, I am getting the same error messages and do not know how to stop them from reoccurring. I cannot identify the source of the problem. If you can advice me, I would be thankful. Here is the message:

[Google Contacts]Uploading item(s) to folder ‘’ failed due to the following error: Parameter validation failed for “resourceName” : The value did not match the regular expression ^people/[^/]+$

Go to the Contacts section in eM Client, then by right-click on the Gmail Contacts folder, choose Properties > Repair.

This worked. Thank you.