Here is the screen-shot of an email whose attachment I am trying to access.

When I try to open the attachment, I am getting the below error

What is the reason behind this, and how can this be solved?

I am trying to process emails using EWS api and my process is stuck on this email because while processing this email I am getting the below error(when Loading the MimeContent of this particular email).

Microsoft.Exchange.WebServices.Data.ServiceRequestException occurred
HResult=-2146233088 Message=The request failed. Unable to read data from the transport connection: The connection was closed.
Source=Microsoft.Exchange.WebServices