I’ve read that this can appear if there aren’t any tweets within 7 days. I’d understand that if this were a consistent issue, but I’m getting differing results from one refresh to the next.
Ultimately, it seems to come down to which Twitter server handles the request. Take a look at the following Gist. Notice the response sizes are consistent from server
tsa_a (from which I am getting content), and all over the place with
tsa_b (when I get the “Hmmm” message). https://git.io/v2lEI
Is this a bug/fluke?