recurring event contains no instances

08:32:57 MailExceptions.OperationException: Uploading item(s) to folder ‘myaccountname@gmail.com/myaccountname@gmail.com/’ failed with an error: Recurring event contains no instances. —> The request ‘Google.Apis.Requests.Request(update @ https://www.googleapis.com/calendar/v…)’ has failed. The service calendar has thrown an exception: Google.GoogleApiRequestException: Google.Apis.Requests.RequestError
08:32:57 Recurring event contains no instances. [400]
08:32:57 Errors [
08:32:57 Message[Recurring event contains no instances.] Location[-] Reason[recurringEventWithoutInstances] Domain[calendar]
08:32:57 ]
08:32:57 —> System.Net.WebException: The remote server returned an error: (400) Bad Request.
08:32:57 at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
08:32:57 at Google.Apis.Requests.Request.InternalEndExecuteRequest(IAsyncResult asyncResult)
08:32:57 — End of inner exception stack trace —

Hello,
please send us the full GData log. Then I will be able to advice you further.