Failed to construct 'RTCPeerConnection

[Ayarn Sawarn]

Hi, 
My ICE server is working fine, but in some cases it generates errors. I'm not sure what I'm supposed to do.

Uncaught DOMException: Failed to construct 'RTCPeerConnection': 'stun:x.xx.xx.xxx:3478?transport=udp' is not a valid stun or turn URL.

and my trun server url is :

config: {
        iceServers: [
          {
            urls: [`stun:${requests.iceServerUrl}:3478?transport=udp`],
            username: "user",
            credential: "pass",
          },
          {
            urls: [`turn:${requests.iceServerUrl}:3478`],
            username: "user",
            credential: "pass",
          },
        ],
      },
    });