An error when starting eClient I can't grasp, let alone solve

Dear Reader,

This is my second post within an hour.
My first post was a matter of convenience, this is a matter of uneasiness.

Everytime I open my eM Client app on one of my computers, I get the same error.
As far as I can tell, it refers to an connection problem with Google.

If someone can explain to me what the problem is, and above all how I can fix it, I would be much obliged.

With kind regards,
Michel F. van den Brun
The Netherlands

POST SCRIPTION: you can find a screenshot of the error in the attachment

Without translating this, I would think that it has to do with an invalid Skype address in your contacts.