Error handling for Url Image 

I'm getting nil for the error in imageloader when the server returns BlobNotFound. Do you have a way to catch this in the completion handler?

the message from the server is:
<Error>
<Code>BlobNotFound</Code>
<Message>
The specified blob does not exist. RequestId:2f7a64bc-0001-00a8-1ee8-fb80c1000000 Time:2016-08-21T20:14:55.4485653Z
</Message>
</Error>
