message: fix: catch local stream error
diff: @@ -98,7 +98,7 @@ export class VideoDialog {
  this.localStream = localStream;
  VideoDialog.attachMediaStream(localVideoElement, localStream);
  - if (localStream.getVideoTracks().length === 0) {
  + if (!localStream || localStream.getVideoTracks().length === 0) {
  Log.debug('No local video device available');
  localVideoElement.hide();
  