I’m requesting this:
and get this:
Is this expected behavior or what do I need to change in my request to make it work?
That image URL does not appear to be valid. Can you repost? The textual content may be sufficient to convey the message. You might also try imgur.com if nothing else works.
Well if you were getting that error at the time, then clearly that indicates there was a temporary outage at that particular moment and you should retry later. Are you still getting that same error?