Socket.io Test Giving Error "an URL must be specified"

Hey guys, I’ve been stuck on this for a couple days. I simplified it to match the example but it’s still not working. When I run the script, it’s neither registering on our Nginx access nor our error logs. Did I miss something obvious? Are you guys still supporting Socket.io?

Node 7.4.0 Artillery 1.5.0 Socket.io 1.7.2

test.yaml:

config:
  target: "https://sub.mydomain.com/api/socket"
  engine: "socketio"
  phases:
    - duration: 10
      arrivalRate: 1
scenarios:
  - name: "Connect"
    flow:
      - emit:
          channel: "room:join"
          data:
            room_id : "dsflj80c0311111"

Output:

Complete report @ 2017-02-05T04:25:43.980Z
  Scenarios launched:  10
  Scenarios completed: 0
  Requests completed:  0
  RPS sent: NaN
  Request latency:
    min: NaN
    max: NaN
    median: NaN
    p95: NaN
    p99: NaN
  Scenario duration:
    min: NaN
    max: NaN
    median: NaN
    p95: NaN
    p99: NaN
  Scenario counts:
    Connect: 10 (Infinity%)
  Errors:
    an URL must be specified: 10