Sync problem with constant error message

Calendar
1

Keep getting this error message. Driving me nuts! Anyone know how to fix this? Error message below.

“[Google Calendar]Uploading item(s) to folder ‘[email protected]/Martins’ failed due to the following error: Value cannot be null. (Parameter ‘value’)”

2

Hello,
You should not leave your address visible. Indicate for example [email protected]
In eM Client, did you just set a calendar account [email protected]?

em Client Calendar
em Client Calendar825×638 57.5 KB