Websocket not sending data for MCX Symbols

I'm using the v3 NODE.js library.

I'm getting updates for NSE symbols, but not for MCX.

function onmsg(message) {
  console.log(message);
}

function onconnect() {
  fyersdata.subscribe(["MCX:NATGASMINI23OCTFUT"]); 
  fyersdata.autoreconnect(); 
}

function onerror(err) {
  console.log(err);
}

function onclose() {
  console.log("socket closed");
}

fyersdata.on("message", onmsg);
fyersdata.on("connect", onconnect);
fyersdata.on("error", onerror);
fyersdata.on("close", onclose);

fyersdata.connect();