Polling Error in Gatling

Hi There

I am a bit new to Gatling, so I apologize in advance for my naive query.
I am trying to achieve polling for a post request (as I need to subscribe to certain events, for which I would like to get updates)

My scenario looks like:

val scn = scenario("LivePolling")
      .every(10 seconds)
          .formParam("Event1!!!", ""))