Getting null response from Rsvps, but proper json output when I use the array

[4clicknetworking]

I've been using the older of the 2 Meetup API client libraries, but today I tried out this one.

Am I configuring something wrong, or is there actually an issue with the client library (it's sort of like jazras' issue)?

When I use the following, I get a null response:

require_once( Meetup.php');
$m = new MeetupRsvps();
$rsvps = $m->getRsvps( array( 'event_id' => $event_id ) );
krumo($rsvps);

However, when I use the following, I get the expected response:

$json = json_decode(file_get_contents($url));
krumo($json);

The library is building the request url alright because I'm getting the proper output, but calling the Rsvp method as described in the documentation is not working.

I'm wondering if I'm just missing something obvious that would make it work.

Cheers,

Ed