I'm using the RetrieveEmail and when I create the automation it works well, but when I close my solution and open again they doesn't work more. Why does it happen?
System.NullReferenceException: Object reference not set to an instance of an object.
at OpenSpan.Office.MicrosoftOutlook.InternalRetrieveEmail(String folder, ReadType readType, MAPIFolder& retrieveFolder)
at OpenSpan.Office.MicrosoftOutlook.RetrieveEmail(String folder, ReadType readType);
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